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

Terms

a(0) =16a(1) =97a(2) =144a(3) =178a(4) =259a(5) =340a(6) =421a(7) =502a(8) =583a(9) =664a(10) =745a(11) =826a(12) =873a(13) =907a(14) =988a(15) =1069a(16) =1150a(17) =1231a(18) =1296a(19) =1393a(20) =1474a(21) =1555a(22) =1602a(23) =1636a(24) =1717a(25) =1798a(26) =1879a(27) =1960a(28) =2041a(29) =2122