0,2

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 44100. Here we consider a move to be a turn of a disc by any amount.

Table of n, a(n) for n=0..12.

Jaap Scherphuis, Puzzle Pages

Cf. A079844.

Sequence in context: A075650 A015645 A001216 * A076941 A006779 A003208

Adjacent sequences: A079840 A079841 A079842 * A079844 A079845 A079846

nonn,fini,full

N. J. A. Sloane, Feb 21 2003

approved