OFFSET
0,4
COMMENTS
We consider a single edge to be 2-connected, so a(1) = 1.
LINKS
Andrew Howroyd, Table of n, a(n) for n = 0..100
PROG
(PARI) seq(n)={Vec(1 + vecsum(Vec(serlaplace(log(x/serreverse(x*deriv(log(sum(k=0, n, 1/(1 - y + O(y*y^n))^binomial(k, 2) * x^k / k!) + O(x*x^n)))))))))} \\ Andrew Howroyd, Nov 29 2018
CROSSREFS
KEYWORD
nonn
AUTHOR
Gus Wiseman, Nov 27 2018
EXTENSIONS
Terms a(7) and beyond from Andrew Howroyd, Nov 29 2018
STATUS
approved