Numbers k such that the string 2,5 occurs in the base 9 representation of k but not of k-1.

Terms

a(0) =23a(1) =104a(2) =185a(3) =207a(4) =266a(5) =347a(6) =428a(7) =509a(8) =590a(9) =671a(10) =752a(11) =833a(12) =914a(13) =936a(14) =995a(15) =1076a(16) =1157a(17) =1238a(18) =1319a(19) =1400a(20) =1481a(21) =1562a(22) =1643a(23) =1665a(24) =1724a(25) =1805a(26) =1863a(27) =1967a(28) =2048a(29) =2129