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A159215
Number of n X n arrays of squares of integers with every 3X3 subblock summing to 15
0
3480, 37772, 213728, 864276, 4577552, 19067804, 73644648, 370791068, 1692340016, 7824640020
OFFSET
3,1
CROSSREFS
Sequence in context: A109484 A232889 A328817 * A176380 A156773 A174753
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 06 2009
STATUS
approved