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A159228
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1/12 the number of n X n arrays of squares of integers with every 2 X 2 subblock summing to 29.
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0
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3, 12, 33, 95, 237, 665, 1669, 4765, 12213, 35557, 92693, 273525, 720597, 2143125, 5679189, 16962005, 45087573, 134958677
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OFFSET
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2,1
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LINKS
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FORMULA
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Empirical G.f.: 1+(-1+x+17*x^2-5*x^3-77*x^4-8*x^5+80*x^6)/((-1+x)*(-1+2*x)*(1+2*x)*(-1+2*x^2)*(-1+8*x^2)). - 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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