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A145054
One-third of the number of n X n nonnegative integer arrays with every 3 X 3 subblock summing to 3.
0
55, 475, 1807, 4627, 22075, 67603, 156763, 647467
OFFSET
3,1
CROSSREFS
Sequence in context: A355511 A129217 A116060 * A166839 A166827 A266035
KEYWORD
nonn
AUTHOR
R. H. Hardin, Sep 30 2008
STATUS
approved