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Search: id:A079820
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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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+0
2
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| 1, 5, 20, 79, 306, 1185, 4550, 17240, 64582, 236713, 841951, 2825790, 7998476, 14330740, 11028854, 2546648, 19660
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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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
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Jaap Scherphuis, Puzzle Pages
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CROSSREFS
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Cf. A079819.
Sequence in context: A129869 A079737 A028814 this_sequence A117422 A003947 A033131
Adjacent sequences: A079817 A079818 A079819 this_sequence A079821 A079822 A079823
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KEYWORD
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nonn,fini,full
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AUTHOR
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njas, Feb 20 2003
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