Numbers k such that 0 and 1 occur juxtaposed in the base-9 representation of k but not of k-1.

Terms

a(0) =9a(1) =81a(2) =163a(3) =171a(4) =244a(5) =252a(6) =325a(7) =333a(8) =406a(9) =414a(10) =487a(11) =495a(12) =568a(13) =576a(14) =649a(15) =657a(16) =729a(17) =892a(18) =900a(19) =973a(20) =981a(21) =1054a(22) =1062a(23) =1135a(24) =1143a(25) =1216a(26) =1224a(27) =1297a(28) =1305a(29) =1378