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A146294 Number of n X n arrays of squares of integers with every (n-1)X(n-1) subblock summing to 8 and every element equal to at least one neighbor. 1
4, 6, 13372, 569370, 4490816, 20143086, 67388028, 187458768, 458291208, 1017185004, 2092976212, 4050199948, 7448027128, 13117064768 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,1

LINKS

Table of n, a(n) for n=3..16.

CROSSREFS

Sequence in context: A137024 A054264 A077305 * A133982 A069179 A336764

Adjacent sequences:  A146291 A146292 A146293 * A146295 A146296 A146297

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 14 2009

STATUS

approved

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Last modified April 11 19:49 EDT 2021. Contains 342888 sequences. (Running on oeis4.)