A032136 - OEIS

%I #9 Sep 12 2018 16:08:30

%S 1,1,2,9,16,85,876,2359,11320,86265,2064700,6086971,37979844,

%T 226139797,2607277050,117848675715,402264826576,2747761713745,

%U 18051206547132,155733808506211,2301810017460220,187092586844572941,714557570758041802,5548996853444210827

%N "CFJ" (necklace, size, labeled) transform of 1,2,3,4...

%H Andrew Howroyd, <a href="/A032136/b032136.txt">Table of n, a(n) for n = 0..200</a>

%H <a href="/index/Lu#Lyndon">Index entries for sequences related to Lyndon words</a>

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

%o (PARI) seq(n)=[subst(serlaplace(p/y),y,1) | p <- Vec(y-1+serlaplace(prod(k=1, n, (1 + k*x^k*y/k! + O(x*x^n)))))] \\ _Andrew Howroyd_, Sep 12 2018

%K nonn

%O 0,3

%A _Christian G. Bower_

%E a(0)=1 prepended and terms a(21) and beyond from _Andrew Howroyd_, Sep 12 2018