a(n) = Sum_{k=0..n} binomial(n,k) * binomial((k+1)^2, n).
A346183
a(n) = Sum_{k=0..n} binomial(n,k) * binomial((k+1)^2, n).
Terms
- a(0) =1a(1) =5a(2) =48a(3) =824a(4) =20690a(5) =687582a(6) =28488488a(7) =1415047216a(8) =81971972604
External references
- oeis: A346183