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A355502
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Inequivalent simultaneous colorings of the faces, vertices and edges of the cube under rotational symmetry using exactly n colors.
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1
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1, 2802750, 105904482864, 187226450755016, 61150982606571900, 6737855626357107000, 342689297671355738880, 9659365383584921484480, 169366933728740293383600, 1995772772375467764487200
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OFFSET
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1,2
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COMMENTS
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This sequence is finite as we have slots for at most 26 colors.
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LINKS
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FORMULA
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a(n) = Sum_{q=0..n} C(n,q) (-1)^(n-q) A356685(q).
a(n) = (n!/24) * (S2(26,n) + 9*S2(14,n) + 8*S2(10,n) + 6*S2(8,n)) where S2 is the Stirling number of the second kind (Stirling set number).
Cycle index is (1/24) * (x1^26 + 6*x1^2*x4^6 + 9*x1^2*x2^12 + 8*x1^2*x3^8).
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CROSSREFS
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KEYWORD
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nonn,fini
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AUTHOR
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STATUS
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approved
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