-2550

Appears in sequences

• McKay-Thompson series of class 6a for Monster.at n=4A007260
• Expansion of (1-x-x^N)/((1-x)(1-x^2)(1-x^3)...(1-x^N)) for N = 5.at n=51A060024
• a(n) = Sum[d|n, d==1 (mod 3), d^2] - Sum[d|n, d==2 (mod 3), d^2].at n=55A103440
• Expansion of psi(-x)^6 in powers of x where psi() is a Ramanujan theta function.at n=35A213791
• -1 + Product_{n>=1} (1 + x^n)^a(n) = g.f. of A000040 (prime numbers).at n=29A305871