A079746 Number of positions that are exactly n moves from the starting position in the Halpern-Meier Pyramid puzzle.

1, 8, 48, 288, 1728, 10128, 57780, 305483, 1239266, 1879631, 237320, 778, 21

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 3732480

Links

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

Jaap Scherphuis, Puzzle Pages

Crossrefs

Sequence in context: A079743 A079765 A079744 * A079745 A079758 A270576

Adjacent sequences: A079743 A079744 A079745 * A079747 A079748 A079749

Keyword

nonn,fini,full

Author

N. J. A. Sloane, Feb 20 2003

Status

approved