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A146521
Number of n X n arrays of squares of integers summing to 27 with every element equal to at least one neighbor.
1
0, 36, 25148, 18912868, 9700090280, 6565665508942
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OFFSET
2,2
LINKS
Table of n, a(n) for n=2..7.
CROSSREFS
Sequence in context:
A001308
A067584
A308423
*
A159431
A028454
A159435
Adjacent sequences:
A146518
A146519
A146520
*
A146522
A146523
A146524
KEYWORD
nonn
AUTHOR
R. H. Hardin
Apr 14 2009
STATUS
approved
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Last modified April 18 22:18 EDT 2024. Contains 371782 sequences. (Running on oeis4.)