a(n) = Sum_{k=0..n} binomial(n, k - 1)*(1 - k)^(k - 1)*(n - k)*(n - k + 1)^(n - k).
A368981
a(n) = Sum_{k=0..n} binomial(n, k - 1)*(1 - k)^(k - 1)*(n - k)*(n - k + 1)^(n - k).
Terms
- a(0) =0a(1) =0a(2) =2a(3) =12a(4) =168a(5) =1720a(6) =33360a(7) =492324a(8) =12510848a(9) =242010864a(10) =7645282560a(11) =183157788220
External references
- oeis: A368981