%I A079817
%S A079817 1,9,54,261,919,1246,378,12
%N A079817 Number of positions that are exactly n moves from the starting position 
               in the Roundy puzzle.
%C A079817 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.
%C A079817 A puzzle in the Rubik cube family. The total number of distinct positions 
               is 2880. Here we count half-turn moves.
%H A079817 Jaap Scherphuis, <a href="http://www.geocities.com/jaapsch/puzzles/">
               Puzzle Pages</a>
%Y A079817 Cf. A079742.
%Y A079817 Sequence in context: A035927 A059597 A023008 this_sequence A027472 A022637 
               A001392
%Y A079817 Adjacent sequences: A079814 A079815 A079816 this_sequence A079818 A079819 
               A079820
%K A079817 nonn,fini,full
%O A079817 0,2
%A A079817 N. J. A. Sloane (njas(AT)research.att.com), Feb 20 2003