Numbers k such that string 2,0 occurs in the base 8 representation of k but not of k-1.

Terms

a(0) =16a(1) =80a(2) =128a(3) =144a(4) =208a(5) =272a(6) =336a(7) =400a(8) =464a(9) =528a(10) =592a(11) =640a(12) =656a(13) =720a(14) =784a(15) =848a(16) =912a(17) =976a(18) =1024a(19) =1104a(20) =1152a(21) =1168a(22) =1232a(23) =1296a(24) =1360a(25) =1424a(26) =1488a(27) =1552a(28) =1616a(29) =1664