Numbers k such that sigma(tau(phi(k))) = phi(tau(sigma(k))).

Terms

a(0) =1a(1) =2a(2) =136a(3) =160a(4) =170a(5) =204a(6) =240a(7) =282a(8) =716a(9) =745a(10) =1002a(11) =1077a(12) =1465a(13) =1509a(14) =1578a(15) =1868a(16) =2012a(17) =2157a(18) =2346a(19) =2720a(20) =2760a(21) =3608a(22) =3898a(23) =4101a(24) =4461a(25) =4512a(26) =5066a(27) =5322a(28) =5898a(29) =6189