Apery (Apéry) numbers: Sum_{k=0..n} (binomial(n,k)*binomial(n+k,k))^2.

A005259

Apery (Apéry) numbers: Sum_{k=0..n} (binomial(n,k)*binomial(n+k,k))^2.

Terms

    a(0) =1a(1) =5a(2) =73a(3) =1445a(4) =33001a(5) =819005a(6) =21460825a(7) =584307365a(8) =16367912425a(9) =468690849005

External references