OFFSET
1,2
COMMENTS
Each chiral pair is counted as one when enumerating unoriented arrangements. The Schläfli symbol of the 24-cell is {3,4,3}. It has 24 octahedral facets. It is self-dual. For n>96, a(n) = 0.
LINKS
Robert A. Russell, Table of n, a(n) for n = 1..96
FORMULA
MATHEMATICA
bp[j_] := Sum[k! StirlingS2[j, k] x^k, {k, 0, j}] (* binomial series *)
Drop[CoefficientList[bp[8]/12+bp[12]/8+bp[16]/8+bp[18]/9+bp[20]/6+19bp[24]/96+bp[32]/24+bp[36]/36+43bp[48]/1152+bp[50]/16+bp[52]/96+bp[60]/96+bp[96]/1152, x], 1]
CROSSREFS
KEYWORD
fini,nonn,full
AUTHOR
Robert A. Russell, Nov 17 2020
STATUS
approved