Numbers whose base-11 representation has the same nonzero number of 1's and 10's.

Terms

a(0) =21a(1) =111a(2) =131a(3) =153a(4) =164a(5) =175a(6) =186a(7) =197a(8) =208a(9) =219a(10) =230a(11) =231a(12) =233a(13) =234a(14) =235a(15) =236a(16) =237a(17) =238a(18) =239a(19) =240a(20) =263a(21) =353a(22) =384a(23) =474a(24) =505a(25) =595a(26) =626a(27) =716a(28) =747a(29) =837