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A146555 Number of n X n arrays of squares of integers summing to 40 with every element equal to at least one neighbor. 1
4, 128, 120672, 102504963, 209207867680 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

LINKS

Table of n, a(n) for n=2..6.

CROSSREFS

Sequence in context: A229385 A141367 A141368 * A305568 A057134 A041495

Adjacent sequences:  A146552 A146553 A146554 * A146556 A146557 A146558

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 14 2009

STATUS

approved

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Last modified March 18 19:58 EDT 2019. Contains 321293 sequences. (Running on oeis4.)