Numbers n such that n=phi(n)*core(n) where phi(x) is the Euler totient function and core(x) the squarefree part of x (the smallest integer such that x*core(x) is a square).
A069185
Numbers n such that n=phi(n)*core(n) where phi(x) is the Euler totient function and core(x) the squarefree part of x (the smallest integer such that x*core(x) is a square).
Terms
- a(0) =1a(1) =2a(2) =8a(3) =12a(4) =32a(5) =48a(6) =108a(7) =128a(8) =192a(9) =432a(10) =512a(11) =768a(12) =972a(13) =1728a(14) =2048a(15) =3072a(16) =3888a(17) =6912a(18) =8192a(19) =8748a(20) =12288a(21) =15552a(22) =27648a(23) =32768a(24) =34992a(25) =49152a(26) =62208a(27) =78732a(28) =110592a(29) =131072
External references
- oeis: A069185