Numbers such that UnitaryPhi(2*UnitaryPhi(n)) = n.

Terms

a(0) =1a(1) =3a(2) =15a(3) =216a(4) =255a(5) =1080a(6) =1728a(7) =8640a(8) =18360a(9) =19344a(10) =65535a(11) =146880a(12) =182880a(13) =309504a(14) =1226400a(15) =2967888a(16) =3456000a(17) =4718520a(18) =7132320a(19) =14738400a(20) =22866096a(21) =23408640a(22) =37748160a(23) =46835712a(24) =47486208a(25) =58752000a(26) =76658400a(27) =79233024a(28) =124416000a(29) =174182400