a(n) = n^n - (n-1)^n + (n-2)^n - ... + (-1)^(k+n)*k^n + ... + (-1)^(2+n)*2^n + (-1)^(1+n)*1^n = Sum_{k=1..n} (-1)^(k+n)*k^n.

A120485

a(n) = n^n - (n-1)^n + (n-2)^n - ... + (-1)^(k+n)*k^n + ... + (-1)^(2+n)*2^n + (-1)^(1+n)*1^n = Sum_{k=1..n} (-1)^(k+n)*k^n.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =20a(4) =190a(5) =2313a(6) =34461a(7) =607408a(8) =12360636a(9) =285188825a(10) =7356173275a(11) =209762134236

External references