-1850

Appears in sequences

• Partition function coefficients for square lattice spin 5/2 Ising model.at n=64A010109
• Dirichlet inverse of sigma_2 function (A001157).at n=42A053822
• McKay-Thompson series of class 30C for Monster.at n=55A058614
• Expansion of (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=43A132000
• Expansion of x/(1+x-x^3-x^5-x^6-x^7-x^9+x^11+x^12).at n=43A143606
• Coefficient array for powers of x^2 of polynomials appearing in a generalized Melham conjecture on alternating sums of fifth powers of Chebyshev S polynomials with odd indices.at n=23A220671
• Expansion of psi(x)^2 * phi(-x)^6 in powers of x where phi(), psi() are Ramanujan theta functions.at n=29A227695
• Dirichlet g.f.: zeta(2*s) / (zeta(s) * zeta(s-2)).at n=42A328639
• a(1) = 1; a(n) = -Sum_{d|n, d < n} A341512(n/d) * a(d), where A341512(n) = sigma(n)*A003961(n) - n*sigma(A003961(n)).at n=44A347096