OFFSET
1,2
LINKS
William A. Stein, Dimensions of the spaces S_k(Gamma_0(N)).
William A. Stein, The modular forms database
FORMULA
From Chai Wah Wu, May 27 2016: (Start)
Conjectured: a(n) = a(n-2) + a(n-3) - a(n-5) for n > 6.
Conjectured: G.f.: x^2*(x^4 + x^3 + 4*x^2 + 5*x + 3)/(x^5 -x^3 -x^2 +1). (End)
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jul 08 2001
STATUS
approved