Numbers k such that string 9,6 occurs in the base 10 representation of k but not of k+1.

Terms

a(0) =96a(1) =196a(2) =296a(3) =396a(4) =496a(5) =596a(6) =696a(7) =796a(8) =896a(9) =969a(10) =996a(11) =1096a(12) =1196a(13) =1296a(14) =1396a(15) =1496a(16) =1596a(17) =1696a(18) =1796a(19) =1896a(20) =1969a(21) =1996a(22) =2096a(23) =2196a(24) =2296a(25) =2396a(26) =2496a(27) =2596a(28) =2696a(29) =2796