The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A056519 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A056519

Number of primitive (period n) periodic palindromic structures using exactly three different symbols.
(history; published version)

#13 by Susanna Cuyler at Tue Oct 01 19:49:51 EDT 2019

STATUS

proposed

approved

#12 by Andrew Howroyd at Tue Oct 01 17:46:48 EDT 2019

STATUS

editing

proposed

#11 by Andrew Howroyd at Tue Oct 01 17:41:58 EDT 2019

FORMULA

Moebius transform of A056509. - Andrew Howroyd, Oct 01 2019

CROSSREFS

Cf. A056482, A056509, A056513, A056514.

#10 by Andrew Howroyd at Tue Oct 01 17:38:10 EDT 2019

DATA

0, 0, 0, 1, 1, 5, 6, 18, 25, 63, 90, 202, 301, 650, 965, 2016, 3025, 6220, 9330, 18970, 28495, 57650, 86526, 174210, 261624, 525693, 788945, 1582462, 2375101, 4759482, 7141686, 14300976, 21457735, 42951825, 64439003, 128946888, 193448101, 387037370, 580606145, 1161485370

LINKS

Andrew Howroyd, <a href="/A056519/b056519.txt">Table of n, a(n) for n = 1..200</a>

FORMULA

a(n) = A056514(n) - A056513(n).

CROSSREFS

Cf. A056482, A056513, A056514.

EXTENSIONS

Terms a(36) and beyond from Andrew Howroyd, Oct 01 2019

STATUS

approved

editing

#9 by N. J. A. Sloane at Tue Aug 22 20:53:14 EDT 2017

AUTHOR

Marks R. Nester (nesterm(AT)dpi.qld.gov.au)

Marks R. Nester

Discussion

Tue Aug 22

20:53

OEIS Server: https://oeis.org/edit/global/2696

#8 by N. J. A. Sloane at Fri May 19 10:39:40 EDT 2017

REFERENCES

M. R. Nester (1999). Mathematical investigations of some plant interaction designs. PhD Thesis. University of Queensland, Brisbane, Australia. [See A056391 for pdf file of Chap. 2]

Discussion

Fri May 19

10:39

OEIS Server: https://oeis.org/edit/global/2652

#7 by N. J. A. Sloane at Sun Apr 09 22:32:19 EDT 2017

STATUS

proposed

approved

#6 by Andrew Howroyd at Sun Apr 09 22:10:14 EDT 2017

STATUS

editing

proposed

#5 by Andrew Howroyd at Sat Apr 08 14:52:44 EDT 2017

DATA

CROSSREFS

Column 3 of A285037.

EXTENSIONS

a(17)-a(35) from Andrew Howroyd, Apr 08 2017

STATUS

approved

editing

#4 by N. J. A. Sloane at Wed Sep 22 03:00:00 EDT 2004

KEYWORD

nonn,new

nonn

AUTHOR

Marks R. Nester (nesterm(AT)qfri1.se2.dpi.qld.gov.au)