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A172724
Number of n X n 0..3 arrays with row sums 7 and column sums 7
1
0, 0, 21, 20112, 84202220, 1070625363840, 36012988082548233, 2867622077261705078784, 494207026605606690167323392, 171330275896315127362166522313600
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OFFSET
1,3
LINKS
R. H. Hardin,
Table of n, a(n) for n=1..21
CROSSREFS
Sequence in context:
A276513
A167063
A115485
*
A001167
A250066
A299035
Adjacent sequences:
A172721
A172722
A172723
*
A172725
A172726
A172727
KEYWORD
nonn
AUTHOR
R. H. Hardin
Feb 06 2010
STATUS
approved
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Last modified August 16 13:06 EDT 2024. Contains 375174 sequences. (Running on oeis4.)