Numbers that are repdigits in base 9.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =4a(5) =5a(6) =6a(7) =7a(8) =8a(9) =10a(10) =20a(11) =30a(12) =40a(13) =50a(14) =60a(15) =70a(16) =80a(17) =91a(18) =182a(19) =273a(20) =364a(21) =455a(22) =546a(23) =637a(24) =728a(25) =820a(26) =1640a(27) =2460a(28) =3280a(29) =4100