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Search: id:A090574
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| A090574 |
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Number of configurations of the 3-dimensional 3 X 3 X 3 sliding cube puzzle that require a minimum of n moves to be reached, starting with the empty space in the center of the combination cube. |
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+0
4
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| 1, 6, 24, 72, 192, 624, 2004, 6504, 19776, 62760, 186000, 583712, 1720972
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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See under A090573.
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EXAMPLE
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a(1)=6 because the empty space in the center of the cube present in the assumed initial configuration can be replaced by any of the 6 adjacent cubes from the face centers in the first move.
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CROSSREFS
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A090572 2 X 2 X 2 puzzle, A090573, A090575, A090576 3 X 3 X 3 puzzle with different initial configurations.
Sequence in context: A092348 A006528 A052749 this_sequence A080373 A058809 A140088
Adjacent sequences: A090571 A090572 A090573 this_sequence A090575 A090576 A090577
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KEYWORD
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fini,hard,more,nonn
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AUTHOR
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Hugo Pfoertner (hugo(AT)pfoertner.org), Jan 15 2004
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