Numbers whose maximal base-10 run length is 2.

Terms

a(0) =11a(1) =22a(2) =33a(3) =44a(4) =55a(5) =66a(6) =77a(7) =88a(8) =99a(9) =100a(10) =110a(11) =112a(12) =113a(13) =114a(14) =115a(15) =116a(16) =117a(17) =118a(18) =119a(19) =122a(20) =133a(21) =144a(22) =155a(23) =166a(24) =177a(25) =188a(26) =199a(27) =200a(28) =211a(29) =220