61341696

Appears in sequences

• a(n) = 2^(n-3)*(n^2+3*n+8).at n=20A072863
• Numbers n such that n=phi(n/d_1)+phi(n/d_2)+...+phi(n/d_k) where d_1 d_2 ... d_k is the decimal expansion of n.at n=2A158993
• G.f. satisfies: A(x) = exp( Sum_{n>=1} [Sum_{k=0..2*n} A200536(n,k)^2 * x^k] / A(x)^n * x^n/n ), where A200536(n,k) is the coefficient of x^k in (1+3*x+2*x^2)^n.at n=37A200537
• a(n) = n^5*(7*n+5)/2.at n=16A229148