A032210 - OEIS

%I #8 Sep 11 2018 21:23:54

%S 1,2,1,7,9,21,148,281,997,3037,83436,187155,906986,4040713,19429075,

%T 967161214,2687357885,15062567325,76117375036,495916450391,

%U 2830109972230,258366446110567,832033559653913,5503200805013334

%N "DFJ" (bracelet, size, labeled) transform of 2,1,1,1...

%H Andrew Howroyd, <a href="/A032210/b032210.txt">Table of n, a(n) for n = 0..200</a>

%H C. G. Bower, <a href="/transforms2.html">Transforms (2)</a>

%o (PARI) seq(n)=[subst(serlaplace(p/y + polcoeff(p,1) + polcoeff(p,2)),y,1)/2 | p <- Vec(y-1+serlaplace((1 + 2*x*y)*prod(k=2, n, 1 + x^k*y/k! + O(x*x^n))))] \\ _Andrew Howroyd_, Sep 11 2018

%K nonn

%O 0,2

%A _Christian G. Bower_

%E a(0)=1 prepended by _Andrew Howroyd_, Sep 11 2018