%I #9 Sep 13 2018 03:05:25
%S 1,2,2,3,6,7,13,26,32,48,78,154,187,287,392,615,1104,1399,2023,2822,
%T 3938,5592,9744,12010,17437,23519,32810,43167,61734,96895,123049,
%U 171206,230504,312588,413394,555082,739195,1133051,1410680
%N "BGK" (reversible, element, unlabeled) transform of 2,1,1,1,...
%H Andrew Howroyd, <a href="/A032062/b032062.txt">Table of n, a(n) for n = 0..1000</a>
%H C. G. Bower, <a href="/transforms2.html">Transforms (2)</a>
%o (PARI) seq(n)=[subst(serlaplace(y^0*p + polcoeff(p,1)),y,1)/2 | p <- Vec(y-1+(1 + x*y)*prod(k=1, n, 1 + x^k*y + O(x*x^n)))] \\ _Andrew Howroyd_, Sep 13 2018
%K nonn
%O 0,2
%A _Christian G. Bower_
%E a(0)=1 prepended by _Andrew Howroyd_, Sep 13 2018