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 3149280.
REFERENCES
D. R. Hofstadter, Metamagical Themas, Basic Books, NY, 1985.
Martin Schoenert, posting to Cube Lovers List, Jan 31 1995.
LINKS
Alan Bawden, Cube Lovers Archive, Part 15
Mark Longridge, God's Algorithm Calculations for Rubik's Cube...
Jaap Scherphuis, Puzzle Pages
CROSSREFS
KEYWORD
nonn,fini,full
AUTHOR
N. J. A. Sloane, Feb 20 2003
STATUS
approved