The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A039047 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A039047

Numbers whose base-7 representation has the same number of 4's and 5's.
(history; published version)

#18 by Jon E. Schoenfield at Sun Jun 20 15:06:15 EDT 2021

STATUS

editing

approved

#17 by Jon E. Schoenfield at Sun Jun 20 15:06:14 EDT 2021

NAME

Numbers whose base-7 representation in base 7 has the same number of 4's and 5's.

STATUS

approved

editing

#16 by Alois P. Heinz at Thu Apr 29 22:06:49 EDT 2021

STATUS

proposed

approved

#15 by Jon E. Schoenfield at Thu Apr 29 21:04:41 EDT 2021

STATUS

editing

proposed

#14 by Jon E. Schoenfield at Thu Apr 29 21:04:40 EDT 2021

NAME

Numbers whose representation in base 7 has the same number of 4's and 5's.

STATUS

approved

editing

#13 by Michel Marcus at Thu Apr 29 12:49:30 EDT 2021

STATUS

reviewed

approved

#12 by Joerg Arndt at Thu Apr 29 12:33:45 EDT 2021

STATUS

proposed

reviewed

#11 by Daniel Starodubtsev at Thu Apr 29 09:17:13 EDT 2021

STATUS

editing

proposed

#10 by Daniel Starodubtsev at Thu Apr 29 09:17:10 EDT 2021

NAME

Numbers n such that whose representation in base 7 has the same number of 4's and 5's.

LINKS

Daniel Starodubtsev, <a href="/A039047/b039047.txt">Table of n, a(n) for n = 1..10000</a>

CROSSREFS

Cf. A007093.

STATUS

approved

editing

#9 by Charles R Greathouse IV at Thu Nov 21 12:46:45 EST 2013

MATHEMATICA

Select[Range[0, 200], DigitCount[#, 7, 4]==DigitCount[#, 7, 5]&] (* From _Harvey P. Dale, _, Mar 22 2011 *)

Discussion

Thu Nov 21

12:46

OEIS Server: https://oeis.org/edit/global/2062