Multiples of 7 using only prime digits (2, 3, 5 and 7).

Terms

a(0) =7a(1) =35a(2) =77a(3) =252a(4) =273a(5) =322a(6) =357a(7) =525a(8) =532a(9) =553a(10) =735a(11) =777a(12) =2233a(13) =2275a(14) =2352a(15) =2373a(16) =2527a(17) =2555a(18) =2723a(19) =2737a(20) =2772a(21) =3227a(22) =3255a(23) =3325a(24) =3332a(25) =3353a(26) =3535a(27) =3577a(28) =3752a(29) =3773