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%I #10 Mar 30 2012 19:00:07
%S 1,1,2,2,1,4,2,1,1,1,1,4,1,4,2,2,1,1,2,3
%N Topswops (2): number of permutations of cards achieving A000376(n).
%C This is for the topswops variation ending in sorted/identity permutation.
%D D. E. Knuth, TAOCP, Section 7.2.1.2, Problems 107-109.
%Y Cf. A000376.
%K nonn
%O 1,3
%A _Moritz Franckenstein_, Nov 28 2010
%E a(20)=3 by Moritz Franckenstein, Apr 16 2011.
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