%I
%S 1,1,2,5,15,54,231,1133,6082,34397,200063,1180798,7023103,41946973,
%T 251144922,1505966757,9040214223,54314351878,326565963479,
%U 1964805696525,11828911080050,71258494789421,429525155047263,2590571415647886
%N Sequence with Hankel transform given by 2^C(n,2)*2^floor(n/3).
%C Hankel transform is A171451.
%F G.f.: 1/(1x/(1x/(1x/(12x/(12x/(12x/(1x/(1x/(1x/(12x/(1... (continued fraction).
%K easy,nonn
%O 0,3
%A _Paul Barry_, Dec 09 2009
