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%I #7 Nov 25 2018 13:50:17
%S 1,5,20,79,306,1185,4550,17240,64582,236713,841951,2825790,7998476,
%T 14330740,11028854,2546648,19660
%N Number of positions that are exactly n moves from the starting position in the Rubik's UFO puzzle.
%C 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 A puzzle in the Rubik cube family. The total number of distinct positions is 39916800. Here we consider a move to be any twist or 60-degree disk turn.
%H Jaap Scherphuis, <a href="http://www.jaapsch.net/puzzles/">Puzzle Pages</a>
%Y Cf. A079819.
%K nonn,fini,full
%O 0,2
%A _N. J. A. Sloane_, Feb 20 2003