a(n) = (n - 3)^2*(n - 4)*2^n*n^(n-5).
A232995
a(n) = (n - 3)^2*(n - 4)*2^n*n^(n-5).
Terms
- a(0) =0a(1) =0a(2) =128a(3) =6912a(4) =301056a(5) =13107200a(6) =604661760a(7) =30105600000
External references
- oeis: A232995
A232995
a(n) = (n - 3)^2*(n - 4)*2^n*n^(n-5).