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A079742
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Number of positions that are exactly n moves from the starting position in the Roundy puzzle.
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1
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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 2880. Here we count quarter-turn moves. There is only one position that needs 9 quarter turns, the position with all the pieces flipped.
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LINKS
| Jaap Scherphuis, Puzzle Pages
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CROSSREFS
| Cf. A079817.
Sequence in context: A014825 A141844 A176476 * A171475 A130019 A196919
Adjacent sequences: A079739 A079740 A079741 * A079743 A079744 A079745
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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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