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A080615
Consider 3 X 3 X 3 Rubik cube, but only allow the moves T2, D2, F2, B2; sequence gives number of positions that are exactly n moves from the start.
1
1, 4, 10, 24, 53, 64, 31, 4, 1
OFFSET
0,2
COMMENTS
Not every position can be reached using this restricted set of moves. Total number of positions that can be reached = 192.
CROSSREFS
Cf. A080601, A080614, etc.
Sequence in context: A107659 A162588 A280541 * A173729 A340569 A097976
KEYWORD
nonn,fini,full
AUTHOR
N. J. A. Sloane, Feb 26 2003
STATUS
approved