a(n) is the sum of the divisors of n^n-1.

A366819

a(n) is the sum of the divisors of n^n-1.

Terms

    a(0) =4a(1) =42a(2) =432a(3) =6048a(4) =67584a(5) =1704240a(6) =38054016a(7) =967814400a(8) =16203253248a(9) =513593801496

External references