|
|
A152169
|
|
Number of positions that are exactly n moves from the starting position in the 2 X 2 X 2 Rubik cube puzzle using only one-way quarter moves.
|
|
3
|
|
|
1, 3, 9, 27, 78, 216, 583, 1546, 4035, 10320, 25824, 62832, 146322, 321876, 635632, 988788, 958176, 450280, 66420, 1192
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,2
|
|
COMMENTS
|
A half-turn is considered to be two moves. The one-way quarter move method has historically being disregarded because of the mechanics of the Rubik's cube. It fills still the complete configuration space with the minimum set of generators.
|
|
LINKS
|
|
|
CROSSREFS
|
|
|
KEYWORD
|
fini,full,nonn
|
|
AUTHOR
|
Alejandro Lorca (alejandro.lorca(AT)fdi.ucm.es), Nov 27 2008
|
|
STATUS
|
approved
|
|
|
|