Numbers n such that string 1,6 occurs in the base 9 representation of n but not of n-1.

Terms

a(0) =15a(1) =96a(2) =135a(3) =177a(4) =258a(5) =339a(6) =420a(7) =501a(8) =582a(9) =663a(10) =744a(11) =825a(12) =864a(13) =906a(14) =987a(15) =1068a(16) =1149a(17) =1215a(18) =1311a(19) =1392a(20) =1473a(21) =1554a(22) =1593a(23) =1635a(24) =1716a(25) =1797a(26) =1878a(27) =1959a(28) =2040a(29) =2121