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A159207 Number of n X n arrays of squares of integers with every 3X3 subblock summing to 7 0
540, 4128, 19028, 64440, 278516, 945816, 2788452, 10699008, 34672388, 103376592, 390361412, 1299118848, 4097433060 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,1

LINKS

Table of n, a(n) for n=3..15.

CROSSREFS

Sequence in context: A253824 A218414 A146123 * A101705 A034620 A146196

Adjacent sequences:  A159204 A159205 A159206 * A159208 A159209 A159210

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 06 2009

STATUS

approved

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Last modified July 19 12:49 EDT 2019. Contains 325159 sequences. (Running on oeis4.)