Odd numbers k that divide phi(k)*sigma(k).

Terms

a(0) =1a(1) =117a(2) =135a(3) =775a(4) =819a(5) =891a(6) =1521a(7) =1701a(8) =2325a(9) =3159a(10) =3375a(11) =4455a(12) =5733a(13) =6875a(14) =6975a(15) =10935a(16) =11907a(17) =19773a(18) =20625a(19) =20925a(20) =22113a(21) =22275a(22) =24025a(23) =40131a(24) =41067a(25) =43875a(26) =44375a(27) =49005a(28) =61875a(29) =62775