0,2

This is different from the sequence giving the number of positions that can be reached in n moves from the start, but which cannot be reached in fewer than n moves (A080601).

A half-turn is considered to be a single move (rather than two moves).

The total number of positions is 901083404981813616.

Relationship with A080601: 243 = 262 - 18 - 1, 3240 = 3502 - 262, 43239 = 46741 - 3502, ...

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

Cf. A080601, A080602.

Adjacent sequences: A080580 A080581 A080582 this_sequence A080584 A080585 A080586

Sequence in context: A062141 A136660 A078205 this_sequence A076693 A083445 A115903

nonn,more

Alex Healy (ahealy(AT)fas.harvard.edu), Feb 21 2003