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A306194
Non-isomorphic colorings of the edges of a cube using at most n colors under rotational symmetries and permutations of the colors.
1
1, 114, 3891, 29854, 87981, 143797, 170335, 177160, 178153, 178243, 178248, 178249, 178249, 178249, 178249, 178249, 178249, 178249, 178249, 178249, 178249, 178249, 178249, 178249, 178249, 178249, 178249, 178249, 178249, 178249, 178249
OFFSET
1,2
COMMENTS
This uses Power Group Enumeration (PGE). The sequence ceases to grow once it reaches a(12) = 178249 because at most twelve colors can be represented and in a coloring with additional colors beyond the initial twelve the new colors can be permuted out and replaced by colors from the initial set, forming part of an orbit that has already been counted.
REFERENCES
F. Harary and E. M. Palmer, Graphical Enumeration, Academic Press, 1973.
CROSSREFS
Cf. A060530.
Sequence in context: A220332 A162675 A221293 * A112485 A220685 A199249
KEYWORD
nonn
AUTHOR
Marko Riedel, Jan 28 2019
STATUS
approved