A032134 "CFJ" (necklace, size, labeled) transform of 2,2,2,2...

1, 2, 2, 14, 18, 62, 1046, 1934, 7538, 33278, 1290822, 2916014, 14298246, 64274862, 430953854, 30305249534, 83399665778, 474765871742, 2411716115558, 15781599222830, 127858161797078, 16263964079638478

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 + 2*x^k*y/k! + O(x*x^n))))] \\ Andrew Howroyd, Sep 12 2018

Crossrefs

Sequence in context: A098288 A032297 A032209 * A032038 A187734 A151353

Adjacent sequences: A032131 A032132 A032133 * A032135 A032136 A032137

Keyword

nonn

Author

Christian G. Bower

Extensions

a(0)=1 prepended by Andrew Howroyd, Sep 12 2018

Status

approved