a(n) is phi(n^n + 1) where phi is the Euler totient function.

A366822

a(n) is phi(n^n + 1) where phi is the Euler totient function.

Terms

    a(0) =1a(1) =1a(2) =4a(3) =12a(4) =256a(5) =1040a(6) =41472a(7) =407680a(8) =16515072a(9) =152845056a(10) =9897840000a(11) =89493288192

External references