Numbers k such that phi(k) = phi(k - phi(k)).

Terms

a(0) =2a(1) =6a(2) =12a(3) =24a(4) =48a(5) =96a(6) =150a(7) =192a(8) =300a(9) =384a(10) =600a(11) =726a(12) =750a(13) =768a(14) =1200a(15) =1452a(16) =1500a(17) =1536a(18) =2310a(19) =2400a(20) =2904a(21) =3000a(22) =3072a(23) =3174a(24) =3750a(25) =4620a(26) =4800a(27) =5046a(28) =5808a(29) =5874