proposed
approved
editing
G.f. = x * Product_{k>0} (1 - x^(3*k)) * (1 - x^(5*k)) * (1 - x^(6*k)) * (1 - x^^(10*k)). - Michael Somos, Nov 17 2014
(MAGMAMagma) Basis( CuspForms( Gamma0(30), 2), 80) [1]; /* Michael Somos, Apr 27 2015 */
OEIS Server: https://oeis.org/edit/global/2944
Euler transform of period 30 sequence [ [0, 0, -1, 0, -1, -2, 0, 0, -1, -2, 0, -2, 0, 0, -2, 0, 0, -2, 0, -2, -1, 0, 0, -2, -1, 0, -1, 0, 0, -4, ...]. - Michael Somos, Nov 17 2014
a(n) = -A286137(3*n). - Michael Somos, Mar 10 2020
Cf. A286137.
Michael Somos: Added more info. Space edit.
M. Koike, On McKay's conjecture, Nagoya Math. J., 95 (1984), 85-89.
M. Koike, <a href="http://projecteuclid.org/euclid.nmj/1118787564">On McKay's conjecture</a>, Nagoya Math. J., 95 (1984), 85-89.