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A032215 "DFK" (bracelet, size, unlabeled) transform of 2,1,1,1... 1

%I

%S 1,2,1,3,3,4,6,7,9,11,19,21,30,38,50,83,101,137,183,249,310,524,618,

%T 871,1125,1543,1959,2621,3934,4890,6582,8639,11417,14765,19499,24509,

%U 36486,44424,59698,76235,101481,127807,168747,212221,273294

%N "DFK" (bracelet, size, unlabeled) transform of 2,1,1,1...

%H Andrew Howroyd, <a href="/A032215/b032215.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/y + polcoeff(p,1) + polcoeff(p,2)), y, 1)/2, Vec(y-1 + (1+2*x*y)*prod(k=2, n, 1 + x^k*y + O(x*x^n))))} \\ _Andrew Howroyd_, Jun 21 2018

%K nonn

%O 0,2

%A _Christian G. Bower_

%E a(0)=1 prepended by _Andrew Howroyd_, Jun 21 2018

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Last modified September 28 20:34 EDT 2022. Contains 357081 sequences. (Running on oeis4.)