-1508

Appears in sequences

• G.f. = { 1+sum(4*n*q^n, n=1..infinity)} / { theta series for square lattice }.at n=13A079902
• (10-n) * Fibonacci(n).at n=13A137392
• a(n) = A171373(n+1) - 2*A171373(n).at n=15A171408
• G.f.: q-Cosh(x,q)^2 - q-Sinh(x,q)^2 at q=-x.at n=51A198199
• G.f.: q-Cosh(x,q)^2 - q-Sinh(x,q)^2 at q=-x.at n=52A198199
• Expansion of k(q)^3 * k'(q)^2 * (K(q) / (Pi/2))^6 / 64 in powers of q where k(), k'(), K() are Jacobi elliptic functions.at n=45A225872
• Difference between sums of quadratic residues and non-residues modulo n that are coprime to n.at n=86A255643
• G.f.: Sum_{n>=0} (x^(n+1) + i)^n / (1 + i*x^n)^(n+1), in which the constant term is taken to be 1.at n=37A323690