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A159201 Number of n X n arrays of squares of integers with every 3X3 subblock summing to 4 0
135, 767, 3223, 10863, 41455, 133967, 386559, 1297583, 3874159, 10725327, 34367791, 100153391, 275262975, 866491247, 2509423663, 6914468943 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,1

LINKS

Table of n, a(n) for n=3..18.

CROSSREFS

Sequence in context: A176313 A215173 A225360 * A211680 A212610 A238330

Adjacent sequences:  A159198 A159199 A159200 * A159202 A159203 A159204

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 06 2009

STATUS

approved

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Last modified July 21 02:02 EDT 2019. Contains 325189 sequences. (Running on oeis4.)