Now is the time of year when we ask all users of the OEIS for their annual support.
Click here to donate
to the OEIS Foundation using PayPal or in other ways.
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 2401. Here positions differing by rotations or reflections are considered distinct.
Table of n, a(n) for n=0..24.
Jaap Scherphuis, Puzzle Pages
Sequence in context: A137035 A137042 A080546 * A064349 A101965 A230370
Adjacent sequences: A080551 A080552 A080553 * A080555 A080556 A080557
N. J. A. Sloane, Feb 21 2003