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A079820
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Number of positions that are exactly n moves from the starting position in the Rubik's UFO puzzle.
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1
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1, 5, 20, 79, 306, 1185, 4550, 17240, 64582, 236713, 841951, 2825790, 7998476, 14330740, 11028854, 2546648, 19660
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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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.
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LINKS
| Jaap Scherphuis, Puzzle Pages
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CROSSREFS
| Cf. A079819.
Sequence in context: A129869 A079737 A028814 * A117422 A154639 A162925
Adjacent sequences: A079817 A079818 A079819 * A079821 A079822 A079823
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KEYWORD
| nonn,fini,full
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Feb 20 2003
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