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A032061 "BGK" (reversible, element, unlabeled) transform of 2,2,2,2,... 0
1, 2, 3, 6, 13, 22, 53, 104, 189, 420, 739, 1420, 2687, 5198, 8907, 15762, 30709, 51322, 92765, 153932, 275181, 478560, 806515, 1334656, 2222951, 3864914, 6233763, 10538622, 16896061, 27407110, 44632877, 74032352, 117178797 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..32.

C. G. Bower, Transforms (2)

PROG

(PARI) seq(n)=[subst(serlaplace(y^0*p + polcoeff(p, 1)), y, 1)/2 | p <- Vec(y-1+prod(k=1, n, 1 + x^k*y + O(x*x^n))^2)] \\ Andrew Howroyd, Sep 13 2018

CROSSREFS

Sequence in context: A111503 A239326 A075530 * A155996 A240104 A018274

Adjacent sequences:  A032058 A032059 A032060 * A032062 A032063 A032064

KEYWORD

nonn

AUTHOR

Christian G. Bower

EXTENSIONS

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

STATUS

approved

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Last modified October 18 01:01 EDT 2018. Contains 316297 sequences. (Running on oeis4.)