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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 (list; graph; refs; listen; history; text; internal format)
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 November 30 17:04 EST 2021. Contains 349424 sequences. (Running on oeis4.)