a(n) = Sum_{k=0..n} binomial(k*n, k).

A226391

a(n) = Sum_{k=0..n} binomial(k*n, k).

Terms

    a(0) =1a(1) =2a(2) =9a(3) =103a(4) =2073a(5) =58481a(6) =2101813a(7) =91492906a(8) =4671050401a(9) =273437232283

External references