Numbers whose base-11 representation has the same nonzero number of 1's and 9's.

Terms

a(0) =20a(1) =100a(2) =130a(3) =152a(4) =163a(5) =174a(6) =185a(7) =196a(8) =207a(9) =218a(10) =220a(11) =222a(12) =223a(13) =224a(14) =225a(15) =226a(16) =227a(17) =228a(18) =230a(19) =240a(20) =262a(21) =342a(22) =383a(23) =463a(24) =504a(25) =584a(26) =625a(27) =705a(28) =746a(29) =826