OFFSET
2,2
COMMENTS
Conjecture: satisfies a linear recurrence having signature (0, 0, 0, 1, 0, 1, 0, 0, 0, -1). - Harvey P. Dale, Jul 07 2021
LINKS
William A. Stein, Dimensions of the spaces S_k^{new}(Gamma_1(N))
William A. Stein, The modular forms database
FORMULA
From Colin Barker, Feb 24 2016: (Start)
a(n) = a(n-4) + a(n-6) - a(n-10) for n>13.
G.f.: -x^2*(1 -39*x -92*x^2 -143*x^3 -195*x^4 -210*x^5 -209*x^6 -169*x^7 -120*x^8 -65*x^9 -13*x^10) / ((1 -x)^2*(1 +x)^2*(1 -x +x^2)*(1 +x^2)*(1 +x +x^2)).
(End)
CROSSREFS
KEYWORD
sign
AUTHOR
N. J. A. Sloane, Jul 14 2001
STATUS
approved