Numbers n such that string 8,0 occurs in the base 10 representation of n but not of n+1.

Terms

a(0) =80a(1) =180a(2) =280a(3) =380a(4) =480a(5) =580a(6) =680a(7) =780a(8) =809a(9) =880a(10) =980a(11) =1080a(12) =1180a(13) =1280a(14) =1380a(15) =1480a(16) =1580a(17) =1680a(18) =1780a(19) =1809a(20) =1880a(21) =1980a(22) =2080a(23) =2180a(24) =2280a(25) =2380a(26) =2480a(27) =2580a(28) =2680a(29) =2780