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A079746
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Number of positions that are exactly n moves from the starting position in the Halpern-Meier Pyramid puzzle.
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0
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1, 8, 48, 288, 1728, 10128, 57780, 305483, 1239266, 1879631, 237320, 778, 21
(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 3732480
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LINKS
| Jaap Scherphuis, Puzzle Pages
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CROSSREFS
| Sequence in context: A079743 A079765 A079744 * A079745 A079758 A051823
Adjacent sequences: A079743 A079744 A079745 * A079747 A079748 A079749
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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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