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A146515
Number of n X n arrays of squares of integers summing to 21 with every element equal to at least one neighbor.
1
0, 92, 17216, 5077564, 1460980380, 540147070759, 87704130371420
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OFFSET
2,2
LINKS
Table of n, a(n) for n=2..8.
CROSSREFS
Sequence in context:
A267734
A146503
A252593
*
A252631
A191948
A278860
Adjacent sequences:
A146512
A146513
A146514
*
A146516
A146517
A146518
KEYWORD
nonn
AUTHOR
R. H. Hardin
Apr 14 2009
STATUS
approved
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Last modified July 4 21:03 EDT 2024. Contains 374017 sequences. (Running on oeis4.)