OFFSET
0,22
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..10000
FORMULA
a(n) = -(1/n)*Sum_{k=1..n} A284281(k)*a(n-k), a(0) = 1.
MATHEMATICA
CoefficientList[Series[Product[1 - x^(5k + 3), {k, 0, 100}], {x, 0, 100}], x] (* Indranil Ghosh, Mar 25 2017 *) (* or *)
a[0]=1; a[n_]:=a[n]= -(1/n) Sum[ a[n-k] DivisorSum[k, # &, Mod[#, 5] == 3 &], {k, n}]; a /@ Range[0, 100] (* Giovanni Resta, Mar 25 2017 *)
PROG
(PARI) Vec(prod(k=0, 100, 1 - x^(5*k + 3)) + O(x^101)) \\ Indranil Ghosh, Mar 25 2017
CROSSREFS
KEYWORD
sign
AUTHOR
Seiichi Manyama, Mar 25 2017
STATUS
approved