Numbers k such that string 1,5 occurs in the base 8 representation of k but not of k+1.

Terms

a(0) =13a(1) =77a(2) =111a(3) =141a(4) =205a(5) =269a(6) =333a(7) =397a(8) =461a(9) =525a(10) =589a(11) =623a(12) =653a(13) =717a(14) =781a(15) =895a(16) =909a(17) =973a(18) =1037a(19) =1101a(20) =1135a(21) =1165a(22) =1229a(23) =1293a(24) =1357a(25) =1421a(26) =1485a(27) =1549a(28) =1613a(29) =1647