Numbers n such that string 0,7 occurs in the base 10 representation of n but not of n+1.

Terms

a(0) =107a(1) =207a(2) =307a(3) =407a(4) =507a(5) =607a(6) =707a(7) =807a(8) =907a(9) =1007a(10) =1079a(11) =1107a(12) =1207a(13) =1307a(14) =1407a(15) =1507a(16) =1607a(17) =1707a(18) =1807a(19) =1907a(20) =2007a(21) =2079a(22) =2107a(23) =2207a(24) =2307a(25) =2407a(26) =2507a(27) =2607a(28) =2707a(29) =2807