A079819 Number of positions that are exactly n moves from the starting position in the Rubik's UFO puzzle.

1, 8, 36, 189, 870, 4182, 19502, 89508, 390114, 1623294, 6100151, 16424349, 14501714, 762762, 120

Offset

0,2

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 39916800. Here we consider a move to be any twist and any disk turn.

Links

Table of n, a(n) for n=0..14.

Jaap Scherphuis, Puzzle Pages

Crossrefs

Cf. A079820.

Sequence in context: A316107 A054627 A019022 * A238815 A341543 A290357

Adjacent sequences: A079816 A079817 A079818 * A079820 A079821 A079822

Keyword

nonn,fini,full

Author

N. J. A. Sloane, Feb 20 2003

Status

approved