Numbers k such that the string 6,3 occurs in the base 7 representation of k but not of k-1.

Terms

a(0) =45a(1) =94a(2) =143a(3) =192a(4) =241a(5) =290a(6) =315a(7) =339a(8) =388a(9) =437a(10) =486a(11) =535a(12) =584a(13) =633a(14) =658a(15) =682a(16) =731a(17) =780a(18) =829a(19) =878a(20) =927a(21) =976a(22) =1001a(23) =1025a(24) =1074a(25) =1123a(26) =1172a(27) =1221a(28) =1270a(29) =1319