Numbers k such that string 1,3 occurs in the base 9 representation of k but not of k-1.

Terms

a(0) =12a(1) =93a(2) =108a(3) =174a(4) =255a(5) =336a(6) =417a(7) =498a(8) =579a(9) =660a(10) =741a(11) =822a(12) =837a(13) =903a(14) =972a(15) =1065a(16) =1146a(17) =1227a(18) =1308a(19) =1389a(20) =1470a(21) =1551a(22) =1566a(23) =1632a(24) =1713a(25) =1794a(26) =1875a(27) =1956a(28) =2037a(29) =2118