Numbers n such that string 8,7 occurs in the base 9 representation of n but not of n+1.

Terms

a(0) =79a(1) =160a(2) =241a(3) =322a(4) =403a(5) =484a(6) =565a(7) =646a(8) =719a(9) =727a(10) =808a(11) =889a(12) =970a(13) =1051a(14) =1132a(15) =1213a(16) =1294a(17) =1375a(18) =1448a(19) =1456a(20) =1537a(21) =1618a(22) =1699a(23) =1780a(24) =1861a(25) =1942a(26) =2023a(27) =2104a(28) =2177a(29) =2185