Numbers n such that string 6,5 occurs in the base 7 representation of n but not of n-1.

Terms

a(0) =47a(1) =96a(2) =145a(3) =194a(4) =243a(5) =292a(6) =329a(7) =341a(8) =390a(9) =439a(10) =488a(11) =537a(12) =586a(13) =635a(14) =672a(15) =684a(16) =733a(17) =782a(18) =831a(19) =880a(20) =929a(21) =978a(22) =1015a(23) =1027a(24) =1076a(25) =1125a(26) =1174a(27) =1223a(28) =1272a(29) =1321