2021760

Appears in sequences

• A triangular sequence of coefficients from a three level exponential expansion function: f(x,t) = log(1 + t)*(1 - t)*exp(x*(t - t^2)).at n=49A137455
• (n-1)-st elementary symmetric function of {1, 2, 2, 3, 3, 4, 4, 5, 5, ..., floor(1+n/2)}.at n=10A203152
• a(n) = phi(12^n-1), where phi is Euler's totient function (A000010).at n=5A366711