Numbers k such that string 4,3 occurs in the base 7 representation of k but not of k-1.

Terms

a(0) =31a(1) =80a(2) =129a(3) =178a(4) =217a(5) =227a(6) =276a(7) =325a(8) =374a(9) =423a(10) =472a(11) =521a(12) =560a(13) =570a(14) =619a(15) =668a(16) =717a(17) =766a(18) =815a(19) =864a(20) =903a(21) =913a(22) =962a(23) =1011a(24) =1060a(25) =1109a(26) =1158a(27) =1207a(28) =1246a(29) =1256