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A338959
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Number of achiral colorings of the 96 edges (or triangular faces) of the 4-D 24-cell using exactly n colors.
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5
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1, 24124751133507582, 883287060135783817036973460, 27692672230411020835164184856095160, 18069944152044184972628509749308321354400, 1018093811663859334508633754250963606821400320
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OFFSET
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1,2
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COMMENTS
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An achiral coloring is identical to its reflection. The Schläfli symbol of the 24-cell is {3,4,3}. It has 24 octahedral facets. It is self-dual. For n>60, a(n) = 0.
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LINKS
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FORMULA
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A338955(n) = Sum_{j=1..Min(n,60)} a(n) * binomial(n,j).
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MATHEMATICA
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bp[j_] := Sum[k! StirlingS2[j, k] x^k, {k, 0, j}] (*binomial series*)
Drop[CoefficientList[bp[16]/6+bp[18]/6+bp[20]/3+bp[24]/4+bp[48]/24+bp[52]/48+bp[60]/48, x], 1]
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CROSSREFS
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Cf. A338956 (oriented), A338957 (unoriented), A338958 (chiral), A338955 (up to n colors), A338951 (vertices, facets), A331353 (5-cell), A331361 (8-cell edges, 16-cell faces), A331357 (16-cell edges, 8-cell faces), A338983 (120-cell, 600-cell).
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KEYWORD
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fini,nonn,full
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AUTHOR
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STATUS
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approved
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