Consider iteration of the function f(x) = sigma(phi(x)) = A062402(x). Sequence lists the numbers k such that the trajectory of k returns to k.

A096998

Consider iteration of the function f(x) = sigma(phi(x)) = A062402(x). Sequence lists the numbers k such that the trajectory of k returns to k.

Terms

    a(0) =1a(1) =3a(2) =7a(3) =12a(4) =15a(5) =28a(6) =31a(7) =60a(8) =72a(9) =124a(10) =168a(11) =195a(12) =252a(13) =255a(14) =744a(15) =1240a(16) =1512a(17) =1651a(18) =2418a(19) =2520a(20) =3066a(21) =3844a(22) =4092a(23) =4800a(24) =5080a(25) =5376a(26) =6045a(27) =6138a(28) =6552a(29) =9906

External references