|
|
A079761
|
|
Number of positions that are exactly n moves from the starting position in the 2 X 2 X 2 Rubik cube puzzle.
|
|
4
|
|
|
1, 9, 54, 321, 1847, 9992, 50136, 227536, 870072, 1887748, 623800, 2644
(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 3674160. A half-turn is considered to be one move.
|
|
REFERENCES
|
D. R. Hofstadter, Metamagical Themas, Basic Books, NY, 1985, p. 359.
|
|
LINKS
|
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,fini,full
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|