Initial values for f(x)=phi(sigma(x)) such that iteration of f ends in cycle of length=15.

Terms

a(0) =467856a(1) =480200a(2) =490000a(3) =499968a(4) =514416a(5) =523344a(6) =524352a(7) =531441a(8) =548400a(9) =549444a(10) =550512a(11) =553728a(12) =556752a(13) =560532a(14) =562500a(15) =562800a(16) =570000a(17) =570276a(18) =570576a(19) =573744a(20) =576240a(21) =579024a(22) =579900a(23) =581700a(24) =584112a(25) =584836a(26) =586756a(27) =590268a(28) =595008a(29) =599076