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%I #8 Jun 21 2018 17:15:25
%S 1,1,2,5,7,15,37,59,108,222,614,892,1799,3045,6085,15988,23820,43421,
%T 75990,132772,234815,621314,875065,1608843,2631976,4602611,7356750,
%U 13220265,31805483,45438961,79680329,129435579,215654860
%N "BFK" (reversible, size, unlabeled) transform of 1,2,3,4...
%H Andrew Howroyd, <a href="/A032045/b032045.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)={apply(p->subst(serlaplace(p + polcoeff(p,1)), y, 1)/2, Vec(y-1+prod(k=1, n, 1 + k*x^k*y + O(x*x^n))))} \\ _Andrew Howroyd_, Jun 21 2018
%K nonn
%O 0,3
%A _Christian G. Bower_
%E a(0)=1 prepended by _Andrew Howroyd_, Jun 21 2018
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