a(n) = Sum_{k=0..n} C(n)^2 * binomial(n + k, k), where C(n) is the n-th Catalan number.
A358368
a(n) = Sum_{k=0..n} C(n)^2 * binomial(n + k, k), where C(n) is the n-th Catalan number.
Terms
- a(0) =1a(1) =3a(2) =40a(3) =875a(4) =24696a(5) =814968a(6) =29899584a(7) =1184303835a(8) =49711519000
External references
- oeis: A358368