This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A084339 #8 Aug 29 2023 15:55:39
%S A084339 6,5,5,4,3,3,2,1,0,0,6,5,5,4,1,1,5,2,6,6,3,0,0,4,1,1,5,1,5,5,2,6,6,3,
%T A084339 0,0,4,1,5,5,2,5,5,2,6,6,3,0,4,4,1,5,5,2,6,6,2,6,3,3,0,4,4,1,5,5,2,6,
%U A084339 3,3,6,3,3,0,4,4,1,5,2,2,6,3,3,0,3,3,0,4,1,1,5,2,2,6,3,3,0,4,0,0,4,1,1,5,2
%N A084339 7*n digit-reversed mod 7.
%C A084339 Unlike the cases 2, 4, 5 and 6 there is no clear pattern.
%t A084339 Table[Mod[IntegerReverse[7n],7],{n,2,110}] (* _Harvey P. Dale_, Aug 29 2023 *)
%Y A084339 Cf. A084052, A084053, A084055, A084339, A084340, A084341.
%K A084339 base,easy,nonn
%O A084339 2,1
%A A084339 _Amarnath Murthy_ and Meenakshi Srikanth (menakan_s(AT)yahoo.com), May 26 2003
%E A084339 More terms from _Ray Chandler_, May 27 2003