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A079820
Number of positions that are exactly n moves from the starting position in the Rubik's UFO puzzle.
1
1, 5, 20, 79, 306, 1185, 4550, 17240, 64582, 236713, 841951, 2825790, 7998476, 14330740, 11028854, 2546648, 19660
OFFSET
0,2
COMMENTS
This is the number of positions that can be reached in n moves from the start, but which cannot be reached in fewer than n moves.
A puzzle in the Rubik cube family. The total number of distinct positions is 39916800. Here we consider a move to be any twist or 60-degree disk turn.
CROSSREFS
Cf. A079819.
Sequence in context: A079737 A028814 A346394 * A275907 A117422 A154639
KEYWORD
nonn,fini,full
AUTHOR
N. J. A. Sloane, Feb 20 2003
STATUS
approved