Numbers n such that string 7,5 occurs in the base 9 representation of n but not of n+1.

Terms

a(0) =68a(1) =149a(2) =230a(3) =311a(4) =392a(5) =473a(6) =554a(7) =620a(8) =635a(9) =716a(10) =797a(11) =878a(12) =959a(13) =1040a(14) =1121a(15) =1202a(16) =1283a(17) =1349a(18) =1364a(19) =1445a(20) =1526a(21) =1607a(22) =1688a(23) =1769a(24) =1850a(25) =1931a(26) =2012a(27) =2078a(28) =2093a(29) =2174