-1861

Appears in sequences

• a(n) = numerator of the coefficient c(n) of x^n in sqrt(1+x)/Product_{k=1..n-1} 1 + c(k)*x^k, n = 1, 2, 3, ...at n=7A170922
• Expansion of psi(x^3)^3 / (psi(x)^2 * psi(x^2)) in powers of x where psi() is a Ramanujan theta function.at n=31A262157
• a(n) = 137*n^2 - 4043*n + 27277.at n=17A267706
• E.g.f.: Product_{k>=1} (1 - (1 - exp(x))^k).at n=6A336097