6208970

Appears in sequences

• a(n) = Sum_{k=0..n} binomial(n,k) * binomial(n^2+k+1,n)/(n^2+k+1).at n=6A336537
• G.f. satisfies A(x) = 1 + x * A(x)^6 * (1 + A(x)).at n=6A371700