-5566

Appears in sequences

• Expansion of f(-x^3) * f(-x^6) / (f(x) * f(-x^4)) in powers of x where f() is a Ramanujan theta function.at n=27A261252
• a(1) = 1; a(n) = -Sum_{k=1..n} a(k/gcd(n,k)).at n=29A343762