A080628 Consider 3 X 3 X 3 Rubik cube, but only allow the <U, R> group to act; sequence gives number of positions that are exactly n moves from the start.

1, 4, 10, 24, 58, 140, 338, 816, 1970, 4756, 11448, 27448, 65260, 154192, 360692, 827540, 1851345, 3968840, 7891990, 13659821, 18471682, 16586822, 8039455, 1511110, 47351, 87

Offset

0,2

Comments

Not every position can be reached using this restricted set of moves. Number of positions that can be reached = 73483200.

Links

Table of n, a(n) for n=0..25.

Mark Longridge, God's Algorithm Calculations for Rubik's Cube...

Crossrefs

Cf. A080601, A080614, etc.

Sequence in context: A192886 A079844 A080617 * A225127 A230954 A190169

Adjacent sequences: A080625 A080626 A080627 * A080629 A080630 A080631

Keyword

nonn,fini,full

Author

N. J. A. Sloane, Feb 26 2003

Status

approved