a(n) = Sum_{k=0..n} n^(n-k) * binomial(2*k,k) * binomial(2*n+1,2*k).
A337387
a(n) = Sum_{k=0..n} n^(n-k) * binomial(2*k,k) * binomial(2*n+1,2*k).
Terms
- a(0) =1a(1) =7a(2) =74a(3) =1175a(4) =24310a(5) =610897a(6) =17920356a(7) =598099077a(8) =22305598630a(9) =917158184525
External references
- oeis: A337387