Nonprime numbers whose cototient is a decimal repunits >1 from A002275.

Terms

a(0) =35a(1) =121a(2) =231a(3) =327a(4) =535a(5) =1111a(6) =2047a(7) =2407a(8) =2911a(9) =3127a(10) =3327a(11) =20767a(12) =45967a(13) =64111a(14) =75847a(15) =81607a(16) =103927a(17) =177367a(18) =202207a(19) =210767a(20) =224295a(21) =234607a(22) =275647a(23) =277807a(24) =290911a(25) =295447a(26) =305887a(27) =308911a(28) =321407a(29) =333327