a(n) = Sum_{k=0..n} binomial(n,k) * binomial(n+k,k) * binomial(2*k,k) / (k+1).
A349768
a(n) = Sum_{k=0..n} binomial(n,k) * binomial(n+k,k) * binomial(2*k,k) / (k+1).
Terms
- a(0) =1a(1) =3a(2) =19a(3) =173a(4) =1881a(5) =22655a(6) =291775a(7) =3940725a(8) =55149025a(9) =793387235a(10) =11668476579a(11) =174735112997
External references
- oeis: A349768