Let sigma_m (n) be result of applying sum-of-divisors function m times to n; call n (m,k)-perfect if sigma_m (n) = k*n; sequence gives the (2,6)-perfect numbers.

A019283

Let sigma_m (n) be result of applying sum-of-divisors function m times to n; call n (m,k)-perfect if sigma_m (n) = k*n; sequence gives the (2,6)-perfect numbers.

Terms

    a(0) =42a(1) =84a(2) =160a(3) =336a(4) =1344a(5) =86016a(6) =550095a(7) =1376256a(8) =5505024a(9) =22548578304

External references