-528

Appears in sequences

• From von Staudt-Clausen representation of Bernoulli numbers: a(n) = Bernoulli(2n) + Sum_{(p-1)|2n} 1/p.at n=9A000146
• a(n) = Sum_{d|n, d == 1 mod 4} d^2 - Sum_{d|n, d == 3 mod 4} d^2.at n=45A002173
• a(n) = Sum_{d|n, d == 1 mod 4} d^2 - Sum_{d|n, d == 3 mod 4} d^2.at n=22A002173
• Coefficients of unique normalized cusp form Delta_18 of weight 18 for full modular group.at n=1A037944
• Dirichlet inverse of the Jordan function J_2 (A007434).at n=22A046970
• McKay-Thompson series of class 12G for Monster.at n=23A058485
• Sum_{d divides n} d^2*(-1)^bigomega(d), where bigomega(n) = A001222(n).at n=22A076792
• a(n) = Sum[d|n, d==1 (mod 3), d^2] - Sum[d|n, d==2 (mod 3), d^2].at n=22A103440
• Sequence is {a(4,n)}, where a(m,n) is defined at sequence A110665.at n=14A110669
• a(n) = -n^2 - n + 72.at n=24A110678
• Expansion of eta(q)^4 * eta(q^2) * eta(q^6)^5 / eta(q^3)^4 in powers of q.at n=22A111661
• Expansion of (9*phi(q)*phi(q^3)^5 - phi(q)^5*phi(q^3))/8 in powers of q where phi(q) is a Ramanujan theta function.at n=23A113261
• a(n) is the determinant of the 3 X 3 matrix with entries the 9 consecutive primes starting with the n-th prime.at n=31A117330
• a(2*n) = 1-n^2, a(2*n+1) = n*(n+1).at n=44A131723
• Expansion of 1 - (1/3) * b(q) * b(q^2) * c(q)^2 / c(q^2) in powers of q where b(), c() are cubic AGM functions.at n=22A132001
• Expansion of (phi(x) * psi(-x))^4 in powers of x where phi(), psi() are Ramanujan theta functions.at n=45A134461
• Expansion of (phi(x) * psi(-x))^4 in powers of x where phi(), psi() are Ramanujan theta functions.at n=23A134461
• Expansion of q^(-1/2) * (eta(q)^4 * eta(q^4)^2 / eta(q^2)^3)^2 in powers of q.at n=11A138502
• Expansion of ((phi(q) * phi(-q^2)^2)^2 - 1) / 4 in powers of q where phi() is a Ramanujan theta function.at n=22A138505
• Expansion of phi(q) / phi(q^3) in powers of q where phi() is a Ramanujan theta function.at n=46A139137