a(n) = Sum_{k=0..n} (-n)^(n-k) * binomial(2*k,k) * binomial(2*n,2*k).

A337420

a(n) = Sum_{k=0..n} (-n)^(n-k) * binomial(2*k,k) * binomial(2*n,2*k).

Terms

    a(0) =1a(1) =1a(2) =-14a(3) =-7a(4) =1222a(5) =-14873a(6) =26196a(7) =3522955a(8) =-110841786a(9) =2088947819a(10) =-15869398244a(11) =-823790768205

External references