a(n) = Sum_{k=0..n} (-1)^(n-k) * binomial(k*n,n).
A349470
a(n) = Sum_{k=0..n} (-1)^(n-k) * binomial(k*n,n).
Terms
- a(0) =1a(1) =1a(2) =5a(3) =65a(4) =1394a(5) =40378a(6) =1470972a(7) =64575585a(8) =3315911300a(9) =194921240846
External references
- oeis: A349470