a(n) = Sum_{k=0..n} (-1)^(n-k) * k! * binomial(n,k) * binomial(2*n+1,k).
A343896
a(n) = Sum_{k=0..n} (-1)^(n-k) * k! * binomial(n,k) * binomial(2*n+1,k).
Terms
- a(0) =1a(1) =2a(2) =11a(3) =104a(4) =1405a(5) =24694a(6) =534223a(7) =13719404a(8) =407730041a(9) =13760958410a(10) =519827337331
External references
- oeis: A343896