Numbers k such that 0 and 6 occur juxtaposed in the base-9 representation of k but not of k-1.

Terms

a(0) =54a(1) =87a(2) =135a(3) =168a(4) =216a(5) =249a(6) =297a(7) =330a(8) =378a(9) =411a(10) =459a(11) =486a(12) =540a(13) =573a(14) =621a(15) =654a(16) =702a(17) =735a(18) =783a(19) =816a(20) =864a(21) =897a(22) =945a(23) =978a(24) =1026a(25) =1059a(26) =1107a(27) =1140a(28) =1188a(29) =1215