521152

Appears in sequences

• Expansion of f(x, x^5)^3 / (f(-x, -x^5) * f(-x^2, -x^2)^2) in powers of x where f(, ) is Ramanujan's general theta function.at n=25A260150
• Expansion of f(-x^6)^2 / (phi(-x) * phi(-x^9)) in powers of x where phi(), f() are Ramanujan theta functions.at n=38A261203
• Number of subsets of {1..n} containing n such that it is not possible to choose a different prime factor of each element (non-choosable).at n=20A370587