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A146196
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Number of n X n arrays of squares of integers with every (n-3)X(n-3) subblock summing to 5 and every element equal to at least one neighbor.
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1
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0, 540, 24646, 108226, 315281, 734060, 1477489, 2682776, 4511681, 7150588, 10810505, 15727064, 22160521, 30395756, 40742273, 53534200, 69130289, 87913916, 110293081
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OFFSET
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5,2
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LINKS
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FORMULA
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Empirical (for n>=10): a(n) = 1026*n^4 - 20236*n^3 + 152815*n^2 - 529236*n + 720920. - Vaclav Kotesovec, Nov 30 2012
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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