-4212

Appears in sequences

• a(n) = -(1/2)*(n+2)*(n^2 - 6*n - 1).at n=22A028494
• Expansion of 1/(sqrt(1+4x^2)+x(1-x)).at n=17A111964
• Expansion of q^(-1/3) * (eta(q) * eta(q^9))^2 / eta(q^3)^4 in powers of q.at n=35A192329
• Expansion of exp( Sum_{n>=1} -sigma(9*n)*x^n/n ) in powers of x.at n=10A283169