Numbers m such that the largest prime power in the factorization of m equals phi(m).

Terms

a(0) =12a(1) =24a(2) =48a(3) =96a(4) =192a(5) =384a(6) =768a(7) =1536a(8) =3072a(9) =6144a(10) =12288a(11) =24576a(12) =49152a(13) =98304a(14) =196608a(15) =393216a(16) =786432a(17) =1572864a(18) =3145728a(19) =6291456a(20) =12582912a(21) =25165824a(22) =50331648a(23) =100663296a(24) =201326592a(25) =402653184a(26) =805306368a(27) =1610612736a(28) =3221225472a(29) =6442450944