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A145052
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One-third of the number of n X n nonnegative integer arrays with every 3 X 3 subblock summing to 1.
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0
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3, 7, 11, 15, 27, 39, 51, 87, 123, 159, 267, 375, 483, 807, 1131, 1455, 2427, 3399, 4371, 7287, 10203, 13119, 21867, 30615
(list; graph; refs; listen; history; internal format)
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