A032147 "CGJ" (necklace, element, labeled) transform of 2,2,2,2...

1, 2, 4, 14, 72, 262, 2266, 13582, 78952, 1073318, 6111354, 51512782, 711544290, 7083724494, 53971180750, 497724073414, 12107546905192, 92786772785254, 1022794345965706, 9782774173172782, 237827594204392882, 3191236514753612878, 31668668622796517470

Offset

0,2

Links

Andrew Howroyd, Table of n, a(n) for n = 0..200

C. G. Bower, Transforms (2)

Index entries for sequences related to Lyndon words

Prog

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

Crossrefs

Sequence in context: A245139 A020131 A261002 * A007712 A192815 A384383

Adjacent sequences: A032144 A032145 A032146 * A032148 A032149 A032150

Keyword

nonn

Author

Christian G. Bower

Extensions

a(0)=1 prepended and terms a(20) and beyond from Andrew Howroyd, Sep 11 2018

Status

approved