2,2
Table of n, a(n) for n=2..61.
William A. Stein, Dimensions of the spaces S_k^{new}(Gamma_1(N))
William A. Stein, The modular forms database
Conjectures 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 -2*x -6*x^2 -7*x^3 -9*x^4 -11*x^5 -9*x^6 -7*x^7 -6*x^8 -2*x^9 +x^10) / ((1 -x)^2*(1 +x)^2*(1 -x +x^2)*(1 +x^2)*(1 +x +x^2)).
(End)
Sequence in context: A030366 A048859 A026311 * A088225 A165775 A258826
Adjacent sequences: A063288 A063289 A063290 * A063292 A063293 A063294
sign
N. J. A. Sloane, Jul 14 2001
approved