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A126276
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Moment of inertia of all magic cubes of order n.
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2
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18, 504, 5200, 31500, 136710, 471968, 1378944, 3547800, 8258250, 17728920, 35603568, 67606084, 122399550, 212688000, 356602880, 579419568, 915652674, 1411582200, 2128266000, 3145097340, 4563969718, 6514114464, 9157680000, 12696125000, 17377501050
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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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a(n) = (n^3)*(n^3 + 1)*(n^2 - 1)/12.
G.f.: -2*x^2*(7*x^5+171*x^4+666*x^3+656*x^2+171*x+9) / (x-1)^9. - Colin Barker, May 08 2013
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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