Numbers k such that string 0,3 occurs in the base 7 representation of k but not of k-1.

Terms

a(0) =52a(1) =101a(2) =150a(3) =199a(4) =248a(5) =297a(6) =346a(7) =364a(8) =395a(9) =444a(10) =493a(11) =542a(12) =591a(13) =640a(14) =689a(15) =707a(16) =738a(17) =787a(18) =836a(19) =885a(20) =934a(21) =983a(22) =1032a(23) =1050a(24) =1081a(25) =1130a(26) =1179a(27) =1228a(28) =1277a(29) =1326