a(n) = Sum_{k=0..n} (-n)^(n-k) * binomial(2*k,k) * binomial(2*n+1,2*k).

A337465

a(n) = Sum_{k=0..n} (-n)^(n-k) * binomial(2*k,k) * binomial(2*n+1,2*k).

Terms

    a(0) =1a(1) =5a(2) =-6a(3) =-139a(4) =1654a(5) =-5853a(6) =-196860a(7) =6258751a(8) =-112580442a(9) =985287863a(10) =26443436876

External references