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A079819 Number of positions that are exactly n moves from the starting position in the Rubik's UFO puzzle. 1
1, 8, 36, 189, 870, 4182, 19502, 89508, 390114, 1623294, 6100151, 16424349, 14501714, 762762, 120 (list; graph; refs; listen; history; text; internal format)
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 A290357 A030112

Adjacent sequences:  A079816 A079817 A079818 * A079820 A079821 A079822

KEYWORD

nonn,fini,full

AUTHOR

N. J. A. Sloane, Feb 20 2003

STATUS

approved

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Last modified March 21 01:18 EDT 2019. Contains 321356 sequences. (Running on oeis4.)