Repdigit numbers that are divisible by 3.

Terms

a(0) =0a(1) =3a(2) =6a(3) =9a(4) =33a(5) =66a(6) =99a(7) =111a(8) =222a(9) =333a(10) =444a(11) =555a(12) =666a(13) =777a(14) =888a(15) =999a(16) =3333a(17) =6666a(18) =9999a(19) =33333a(20) =66666a(21) =99999a(22) =111111a(23) =222222a(24) =333333a(25) =444444a(26) =555555a(27) =666666a(28) =777777a(29) =888888