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A146300 Number of n X n arrays of squares of integers summing to 9 with every element equal to at least one neighbor. 1
0, 1, 1640, 123744, 1546356, 9282128, 37896264, 121782952, 331901924, 801191922, 1761200680, 3592793804, 6894127812, 12569395174 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,3

LINKS

Table of n, a(n) for n=2..15.

CROSSREFS

Sequence in context: A234986 A043464 A002434 * A035866 A015340 A272127

Adjacent sequences:  A146297 A146298 A146299 * A146301 A146302 A146303

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 14 2009

STATUS

approved

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Last modified April 20 20:26 EDT 2021. Contains 343137 sequences. (Running on oeis4.)