-10640

Appears in sequences

• Expansion of (Sum_{n=-inf..inf} x^(n^2))^(-19).at n=3A004420
• Sum_{k=1..2n-1} J(4*n,k)*k^2, where J(i,j) is the Jacobi symbol.at n=34A097544
• a(n) = (-1)^(n+1) * n*(n-1)*(n-4)*(n+1)/12.at n=18A167387