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#47 by Charles R Greathouse IV at Thu Sep 08 08:45:01 EDT 2022
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| PROG
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(MAGMAMagma) [6^Floor((n+1)/2): n in [0..40]]; // Vincenzo Librandi, Aug 16 2011
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Discussion
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| Thu Sep 08
| 08:45
| OEIS Server: https://oeis.org/edit/global/2944
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#46 by Peter Luschny at Mon Sep 30 18:11:15 EDT 2019
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#45 by Michel Marcus at Mon Sep 30 14:51:52 EDT 2019
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#44 by Andrew Howroyd at Mon Sep 30 14:28:25 EDT 2019
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#43 by Andrew Howroyd at Mon Sep 30 14:27:23 EDT 2019
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#42 by Andrew Howroyd at Mon Sep 30 14:24:22 EDT 2019
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| CROSSREFS
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Column k=6 of A321391.
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| KEYWORD
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nonn,base,easy
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| STATUS
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approved
editing
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#41 by OEIS Server at Sat Nov 10 09:49:38 EST 2018
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| LINKS
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Vincenzo Librandi, <a href="/A056452/b056452_1.txt">Table of n, a(n) for n = 0..2000</a>
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#40 by N. J. A. Sloane at Sat Nov 10 09:49:38 EST 2018
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Discussion
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| Sat Nov 10
| 09:49
| OEIS Server: Installed new b-file as b056452.txt. Old b-file is now b056452_1.txt.
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#39 by David A. Corneth at Fri Nov 09 04:15:23 EST 2018
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Discussion
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| Fri Nov 09
| 05:07
| Michel Marcus: Personnaly I did not find the name obscure
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| 09:04
| Robert A. Russell: The problem with palindrome, as with necklace and bracelet, is that it is not a general term. It applies to one specific type of linear arrangement. More general terms, such as achiral row, indicate relationships to other forms (chiral row, oriented row, achiral cycle, etc.). It is as if we had individual names for acute angles, right angles, etc., disguising the fact that they are all angles. I love the generality of mathematics and denigrate the employment of limiting names.
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| 09:23
| Robert A. Russell: That should have been "deprecate," not "denigrate."
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| 09:32
| David A. Corneth: I see. I like the idea of general terms. Now I'm not quite familiar with the phrase "chiral row" and I might not be the only one. Would it be okay to say: "Number of achiral rows (also known as palindromes)..." or "Number of palindromes (also known as achiral rows)..." (if that's even correct)?
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| 09:32
| David A. Corneth: I'm okay with either 'order' though the former might fit better.
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| 11:25
| Robert A. Russell: I would mildly tend to go with the second choice, as I do not like to alter the names originally applied unless there is a major problem.
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#38 by David A. Corneth at Fri Nov 09 04:15:15 EST 2018
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| NAME
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a(n) is the number of palindromes with n digits using a maximum of six different symbols.
a(n) = 6^floor((n+1)/2).
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| COMMENTS
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Also: a(n) is the number of palindromes with n digits using a maximum of six different symbols. - David A. Corneth, Nov 09 2018
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| STATUS
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proposed
editing
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