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 (3,k)-perfect numbers.
A019292
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 (3,k)-perfect numbers.
Terms
- a(0) =1a(1) =12a(2) =14a(3) =24a(4) =52a(5) =98a(6) =156a(7) =294a(8) =684a(9) =910a(10) =1368a(11) =1440a(12) =4480a(13) =4788a(14) =5460a(15) =5840a(16) =6882a(17) =7616a(18) =9114a(19) =14592a(20) =18288a(21) =22848a(22) =32704a(23) =40880a(24) =52416a(25) =53760a(26) =54864a(27) =56448a(28) =60960a(29) =65472
External references
- oeis: A019292