a(n) = Sum_{k=0..n} (-1)^(n-k) * binomial(n,k) * binomial(n*k,k) / ((n-1)*k+1).
A378409
a(n) = Sum_{k=0..n} (-1)^(n-k) * binomial(n,k) * binomial(n*k,k) / ((n-1)*k+1).
Terms
- a(0) =1a(1) =0a(2) =1a(3) =5a(4) =73a(5) =1409a(6) =36601a(7) =1198798a(8) =47594289a(9) =2225255777a(10) =119896198381
External references
- oeis: A378409