The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A209904

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A209904

The number of 6 X 6 matrices of nonnegative integers such that the sum of the entries in the i-th row equals the sum of the i-th column for each i and the total sum equals n.
(history; published version)

#12 by Robert Israel at Tue Aug 11 16:42:12 EDT 2015

STATUS

reviewed

approved

#11 by Robert Israel at Tue Aug 11 16:40:52 EDT 2015

STATUS

proposed

reviewed

#10 by Bruno Berselli at Tue Aug 11 15:51:57 EDT 2015

STATUS

editing

proposed

#9 by Bruno Berselli at Tue Aug 11 15:51:53 EDT 2015

NAME

The number of 6 x X 6 matrices of non-negative nonnegative integers such that the sum of the entries in the i-th row equals the sum of the i-th column for each i and the total sum equals n.

CROSSREFS

Cf. A209836 (5 x X 5 matrices).

STATUS

approved

editing

#8 by Russ Cox at Sat Mar 31 10:33:20 EDT 2012

AUTHOR

_Kazunori Nakamoto (nakamoto(AT)yamanashi.ac.jp), __, _Shingo Okuyama_, Mar 15 2012

Discussion

Sat Mar 31

10:33

OEIS Server: https://oeis.org/edit/global/866

#7 by Russ Cox at Sat Mar 31 10:22:26 EDT 2012

AUTHOR

Kazunori Nakamoto (nakamoto(AT)yamanashi.ac.jp), _Shingo Okuyama (okuyama(AT)di.kagawa-nct.ac.jp), _, Mar 15 2012

Discussion

Sat Mar 31

10:22

OEIS Server: https://oeis.org/edit/global/343

#6 by T. D. Noe at Fri Mar 16 18:36:03 EDT 2012

STATUS

proposed

approved

#5 by T. D. Noe at Fri Mar 16 10:48:50 EDT 2012

STATUS

editing

proposed

#4 by T. D. Noe at Fri Mar 16 10:48:16 EDT 2012

CROSSREFS

Cf. A209836 (5 x 5 matrices).

STATUS

proposed

editing

Discussion

Fri Mar 16

10:48

T. D. Noe: Here's the 5x5 case. Where are the 4x4, etc.?

#3 by Shingo Okuyama at Thu Mar 15 00:27:56 EDT 2012

STATUS

editing

proposed

Discussion

Thu Mar 15

01:03

T. D. Noe: You should mention the A-numbers of similar sequences. I think the 5 x 5 case was OKed today. What are the 4 x 4, 3 x 3, and 2 x 2 cases?  Some code would be nice.