OFFSET
1,2
COMMENTS
Multiplicative because convolution of multiplicative functions. - Michael Somos, Jun 07, 2005
LINKS
G. C. Greubel, Table of n, a(n) for n = 1..5000
K. Ono, On the Circular Summation of the Eleventh Powers of Ramanujan's Theta Function, Journal of Number Theory, Volume 76, Issue 1, May 1999, Pages 62-65.
FORMULA
a(n) = Sum_{d | n} Kronecker(d/11)*(n/d)^4
MATHEMATICA
a[n_]:= If[n < 0, 0, Sum[KroneckerSymbol[d, 11]*(n/d)^4, {d, Divisors[n]}]]; Table[a[n], {n, 0, 50}] (* G. C. Greubel, Apr 17 2018 *)
CROSSREFS
KEYWORD
nonn,mult
AUTHOR
Kok Seng Chua (chuaks(AT)ihpc.nus.edu.sg), Nov 20 2001
STATUS
approved