130390

Appears in sequences

• L.g.f.: Sum_{n>=1} x^n/n * Sum_{k=0..n} binomial(n,k)^2 * x^k*(1-x)^(n-k).at n=19A217464
• If n is 0, 1, or prime, a(n) = n; else a(n) = a(n-1) + a(n-2).at n=51A265822