A 4-cycle of the k => sigma(k)-k process, where sigma(k) is the sum of divisors of k (A000203).

A073032

A 4-cycle of the k => sigma(k)-k process, where sigma(k) is the sum of divisors of k (A000203).

Terms

    a(0) =18048976a(1) =20100368a(2) =18914992a(3) =19252208a(4) =18048976a(5) =20100368a(6) =18914992a(7) =19252208a(8) =18048976a(9) =20100368a(10) =18914992a(11) =19252208a(12) =18048976a(13) =20100368a(14) =18914992a(15) =19252208a(16) =18048976a(17) =20100368a(18) =18914992a(19) =19252208a(20) =18048976a(21) =20100368a(22) =18914992a(23) =19252208a(24) =18048976

External references