a(n) = numerator of Sum_{k = 1..n} (1/k) * binomial(n,k)^2 * binomial(n+k,k)^2 for n >= 1 with a(0) = 0.
A357511
a(n) = numerator of Sum_{k = 1..n} (1/k) * binomial(n,k)^2 * binomial(n+k,k)^2 for n >= 1 with a(0) = 0.
Terms
- a(0) =0a(1) =4a(2) =54a(3) =2182a(4) =36625a(5) =3591137a(6) =25952409a(7) =4220121443a(8) =206216140401
External references
- oeis: A357511