A032234 "DGK" (bracelet, element, unlabeled) transform of 1,3,5,7,...

1, 1, 3, 8, 15, 34, 67, 135, 285, 598, 1314, 2946, 6702, 15403, 35569, 82884, 190820, 444384, 1026605, 2364499, 5454576, 12522380, 28698420, 65469202, 149407615, 339508581, 769387875, 1739536216, 3922183539, 8828954730

Offset

0,3

Links

Andrew Howroyd, Table of n, a(n) for n = 0..500

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+prod(k=1, n, (1 + x^k*y + O(x*x^n))^(2*k-1)))] \\ Andrew Howroyd, Sep 13 2018

Crossrefs

Sequence in context: A090741 A376764 A255835 * A032255 A137475 A176433

Adjacent sequences: A032231 A032232 A032233 * A032235 A032236 A032237

Keyword

nonn

Author

Christian G. Bower

Extensions

a(0)=1 prepended by Andrew Howroyd, Sep 13 2018

Status

approved