Numbers n such that string 1,7 occurs in the base 8 representation of n but not of n+1.

Terms

a(0) =15a(1) =79a(2) =127a(3) =143a(4) =207a(5) =271a(6) =335a(7) =399a(8) =463a(9) =527a(10) =591a(11) =639a(12) =655a(13) =719a(14) =783a(15) =847a(16) =911a(17) =1023a(18) =1039a(19) =1103a(20) =1151a(21) =1167a(22) =1231a(23) =1295a(24) =1359a(25) =1423a(26) =1487a(27) =1551a(28) =1615a(29) =1663