Numbers whose base-5 representation is the juxtaposition of two identical strings.

Terms

a(0) =6a(1) =12a(2) =18a(3) =24a(4) =130a(5) =156a(6) =182a(7) =208a(8) =234a(9) =260a(10) =286a(11) =312a(12) =338a(13) =364a(14) =390a(15) =416a(16) =442a(17) =468a(18) =494a(19) =520a(20) =546a(21) =572a(22) =598a(23) =624a(24) =3150a(25) =3276a(26) =3402a(27) =3528a(28) =3654a(29) =3780