a(n) = Sum_{k=0..n} (binomial(n,k) * binomial(n+k,k))^2 * 2^(n-k).
A382642
a(n) = Sum_{k=0..n} (binomial(n,k) * binomial(n+k,k))^2 * 2^(n-k).
Terms
- a(0) =1a(1) =6a(2) =112a(3) =2784a(4) =79716a(5) =2478936a(6) =81369856a(7) =2774798592a(8) =97345792804
External references
- oeis: A382642