Sum[k^(n-k)], where sum is over positive integers, k, where k <= n and gcd(k,n) = 1.

A057791

Sum[k^(n-k)], where sum is over positive integers, k, where k <= n and gcd(k,n) = 1.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =4a(4) =22a(5) =6a(6) =209a(7) =376a(8) =1835a(9) =2540a(10) =49863a(11) =94944a(12) =1151914a(13) =2190666a(14) =12079274a(15) =95722288a(16) =1150653920a(17) =3217888350a(18) =47454745803a(19) =130819911320a(20) =846278385786

External references