OFFSET
1,3
LINKS
Andrew Howroyd, Table of n, a(n) for n = 1..1000
Eric Weisstein's World of Mathematics, Maximum Vertex Degree
PROG
(PARI) seq(n) = Vec( (1-x)*(1-x^2)/prod(k=1, n, 1 - x^k + O(x*x^n))^2 - 1/((1-x)*(1-x^2)), -n) \\ Andrew Howroyd, Sep 03 2019
CROSSREFS
KEYWORD
nonn
AUTHOR
Andrew Howroyd, Sep 03 2019
STATUS
approved