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%I #8 Oct 01 2012 21:01:33
%S 0,0,2,2,4,10,20,38,82,164,328,660,1320,2640,5304,10596,21192,42424,
%T 84848,169668,339428,678856,1357712,2715548,5431096,10862192,21724746,
%U 43449380,86898760,173798220,347596440,695192670
%N Number of sequences of 2's and 3's of length n with curling number 3.
%Y Column 3 of A216955. Cf. A122536, A217211.
%K nonn
%O 1,3
%A _N. J. A. Sloane_, Oct 01 2012
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