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Number of non-isomorphic positions reached for the first time in exactly n quarter-turns exactly on a 3 X 3 X 3 Rubik's Cube.
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%I #3 Jun 01 2010 03:00:00

%S 1,1,5,17,130,1031,9393,86183

%N Number of non-isomorphic positions reached for the first time in exactly n quarter-turns exactly on a 3 X 3 X 3 Rubik's Cube.

%C There are at most 96 positions which are in the same isomorphic class.

%D Boris Golden, TIPE on Rubik's Cube (a TIPE is a French short research work done by students for competitive examinations).

%e a(1) = 1 because the 12 quarter turns are isomorphic.

%K nonn

%O 0,3

%A Boris Golden, Jun 27 2004