A032209 "DFJ" (bracelet, size, labeled) transform of 2,2,2,2...

1, 2, 2, 14, 18, 62, 566, 1094, 3954, 17150, 646182, 1460054, 7152294, 32145622, 215489878, 15152657534, 41699885554, 237383066942, 1205858271302, 7890800135702, 63929081762358, 8131982041916390, 26062267807810918

Offset

0,2

Links

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

C. G. Bower, Transforms (2)

Prog

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

Crossrefs

Sequence in context: A045676 A098288 A032297 * A032134 A032038 A187734

Adjacent sequences: A032206 A032207 A032208 * A032210 A032211 A032212

Keyword

nonn

Author

Christian G. Bower

Extensions

a(0)=1 prepended by Andrew Howroyd, Sep 11 2018

Status

approved