-2552

Appears in sequences

• Expansion of f(-q) / f(q) in powers of q where f() is a Ramanujan theta function.at n=29A108494
• Expansion of phi(-q) / phi(q^2) in powers of q where phi() is a Ramanujan theta function.at n=29A210030
• Difference between sums of quadratic residues and non-residues modulo n (residues are not necessarily coprime to n).at n=87A255644
• a(0) = 1; a(n) = a(n-1) - Sum_{k=0..n-1} k * a(k) * a(n-1-k).at n=10A386473