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Search: id:A079742
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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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+0
2
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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 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
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Jaap Scherphuis, Puzzle Pages
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CROSSREFS
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Cf. A079817.
Sequence in context: A005284 A014825 A141844 this_sequence A130019 A049651 A109114
Adjacent sequences: A079739 A079740 A079741 this_sequence A079743 A079744 A079745
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KEYWORD
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nonn,fini,full
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com), Feb 20 2003
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