OFFSET
55,3
LINKS
Alois P. Heinz, Table of n, a(n) for n = 55..1000
FORMULA
G.f.: Sum_{k>=1} mu(k)* x^(55*k) / Product_{j=1..10} (1 - x^(j*k)).
a(n) <= A008639(n-55), equality for n<110. - R. J. Mathar, Feb 28 2021
MATHEMATICA
nmax = 108; CoefficientList[Series[Sum[MoebiusMu[k] x^(55 k)/Product[1 - x^(j k), {j, 1, 10}], {k, 1, nmax}], {x, 0, nmax}], x] // Drop[#, 55] &
CROSSREFS
KEYWORD
nonn
AUTHOR
Ilya Gutkovskiy, Feb 23 2021
STATUS
approved