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A172748
Number of n X n 0..3 arrays with row sums 2*n and column sums 2*n
0
1, 3, 55, 8515, 13130451, 210668680701, 36012988082548233, 68307608848277646753795, 1469748355306450464225368161315, 364459290339560650671344361875961740353
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OFFSET
1,2
LINKS
Table of n, a(n) for n=1..10.
CROSSREFS
Sequence in context:
A297965
A002818
A119190
*
A172822
A172873
A172907
Adjacent sequences:
A172745
A172746
A172747
*
A172749
A172750
A172751
KEYWORD
nonn
AUTHOR
R. H. Hardin
Feb 06 2010
STATUS
approved
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Last modified August 8 12:42 EDT 2024. Contains 375021 sequences. (Running on oeis4.)