A032135 "CFJ" (necklace, size, labeled) transform of 2,1,1,1...

1, 2, 1, 7, 9, 21, 268, 491, 1893, 5809, 166476, 373275, 1812374, 8077317, 38851660, 1934306029, 5374689421, 30125069097, 152234643292, 991832638619, 5660219512530, 516732891172537, 1664067117563368

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((1 + 2*x*y)*prod(k=2, n, 1 + x^k*y/k! + O(x*x^n))))] \\ Andrew Howroyd, Sep 12 2018

Crossrefs

Sequence in context: A026252 A032298 A032210 * A032039 A203991 A075118

Adjacent sequences: A032132 A032133 A032134 * A032136 A032137 A032138

Keyword

nonn

Author

Christian G. Bower

Extensions

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

Status

approved