The On-Line Encyclopedia of Integer Sequences (OEIS)

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A172722

Number of n X n 0..3 arrays with row sums 6 and column sums 6
(history; published version)

#4 by Russ Cox at Sat Mar 31 12:35:41 EDT 2012

AUTHOR

_R. H. Hardin (rhhardin(AT)att.net) _ Feb 06 2010

Discussion

Sat Mar 31

12:35

OEIS Server: https://oeis.org/edit/global/875

#3 by N. J. A. Sloane at Thu Nov 11 07:34:06 EST 2010

LINKS

R. H. Hardin, <a href="/A172722/b172722.txt">Table of n, a(n) for n=1..25</a>

KEYWORD

nonn,new

nonn

#2 by N. J. A. Sloane at Sat Oct 02 03:00:00 EDT 2010

KEYWORD

nonn,new

nonn

AUTHOR

Ron R. H. Hardin (rhhardin(AT)att.net) Feb 06 2010

#1 by N. J. A. Sloane at Tue Jun 01 03:00:00 EDT 2010

NAME

Number of n X n 0..3 arrays with row sums 6 and column sums 6

DATA

0, 1, 55, 27636, 45934340, 210668680701, 2310106618930215, 54450121092072227480, 2538708180710780880644304, 218999995866993338639652628800, 33082630485031588732233929380223040

OFFSET

1,3

LINKS

R. H. Hardin, <a href="b172722.txt">Table of n, a(n) for n=1..25</a>

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net) Feb 06 2010

STATUS

approved