a(n) = Sum_{k=0..n} binomial(2^(n-k) + k, n-k).

A136507

a(n) = Sum_{k=0..n} binomial(2^(n-k) + k, n-k).

Terms

    a(0) =1a(1) =3a(2) =10a(3) =71a(4) =1925a(5) =203904a(6) =75214965a(7) =94608676477

External references