-1970

Appears in sequences

• Expansion of a modular function for gamma_0(6).at n=13A006708
• a(0) = -1, otherwise a(n) = (-1)^n*(n^3 - 15*n^2 + 2*n - 12)/6.at n=29A173248
• a(n) = Pell(n)*A113973(n) for n>=1, with a(0)=1, where A113973 lists the coefficients in phi(x^3)^3/phi(x) and phi() is a Ramanujan theta function.at n=9A209449