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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
OFFSET
3,1
CROSSREFS
Sequence in context: A218414 A328133 A146123 * A101705 A034620 A146196
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 06 2009
STATUS
approved