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A079875
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Number of positions that are exactly n moves from the starting position in the Lights Out 2000 puzzle.
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0
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1, 25, 325, 2900, 19850, 110630, 520948, 2125078, 7644164, 24561916, 71147752, 186876765, 446015084, 964537892, 1872111656, 3203446007, 4709112417, 5767439109, 5710406148, 4433675458, 2590026921, 1073252214, 279734731, 36143633, 2147985
(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 31381059609.
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LINKS
| Jaap Scherphuis, Puzzle Pages
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CROSSREFS
| Sequence in context: A000446 A124980 A188355 * A162702 A010977 A022589
Adjacent sequences: A079872 A079873 A079874 * A079876 A079877 A079878
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KEYWORD
| nonn,fini,full
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Feb 21 2003
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