189252

Appears in sequences

• a(n) = n*(4*n^2 + 2*n + 1).at n=36A110451
• Numbers n such that sigma(phi(n))-phi(n) = phi(sigma(n)-n).at n=13A132793
• a(n) = n! * [x^n] -exp(n*x)*LambertW(-x).at n=6A292633