OFFSET
0,5
COMMENTS
Permuting the colors does not change the structure.
LINKS
Andrew Howroyd, Table of n, a(n) for n = 0..200
PROG
(PARI) seq(n)={Vec(1 + intformal(sum(m=1, n, moebius(m)*subst(serlaplace(-1 + exp(sumdiv(m, d, (exp(d*x + O(x*x^(n\m)))-1)/d))), x, x^m))/x))}
CROSSREFS
KEYWORD
nonn
AUTHOR
Andrew Howroyd, Sep 22 2019
STATUS
approved