a(n) = Sum_{k=0..floor(n/2)} (-1)^k * binomial(n*(n-k),n*k).
A348321
a(n) = Sum_{k=0..floor(n/2)} (-1)^k * binomial(n*(n-k),n*k).
Terms
- a(0) =1a(1) =1a(2) =0a(3) =-19a(4) =-493a(5) =-12500a(6) =2110381a(7) =2291797033
External references
- oeis: A348321