%I #11 Sep 13 2018 03:05:49
%S 1,1,1,2,2,3,6,7,10,14,29,33,51,67,97,176,218,309,426,589,778,1376,
%T 1649,2379,3147,4381,5653,7802,12158,15231,20934,27871,37438,49022,
%U 65405,84213,128703,157987,215533,279164,375746,479133
%N "BGK" (reversible, element, unlabeled) transform of 1,1,1,1,...
%H Andrew Howroyd, <a href="/A032058/b032058.txt">Table of n, a(n) for n = 0..1000</a>
%H C. G. Bower, <a href="/transforms2.html">Transforms (2)</a>
%F Numbers so far satisfy a(n) = 1/2 * (A032020(n)+1). - _Ralf Stephan_, Apr 06 2004
%o (PARI) seq(n)=[subst(serlaplace(y^0*p + polcoeff(p,1)),y,1)/2 | p <- Vec(y-1+prod(k=1, n, 1 + x^k*y + O(x*x^n)))] \\ _Andrew Howroyd_, Sep 13 2018
%K nonn
%O 0,4
%A _Christian G. Bower_
%E a(0)=1 prepended by _Andrew Howroyd_, Sep 13 2018