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 A053843 #22 Aug 09 2024 10:08:41
%S A053843 0,1,2,3,4,5,6,7,1,2,3,4,5,6,7,0,2,3,4,5,6,7,0,1,3,4,5,6,7,0,1,2,4,5,
%T A053843 6,7,0,1,2,3,5,6,7,0,1,2,3,4,6,7,0,1,2,3,4,5,7,0,1,2,3,4,5,6,1,2,3,4,
%U A053843 5,6,7,0,2,3,4,5,6,7,0,1,3,4,5,6,7,0,1,2,4,5,6,7,0,1,2,3,5,6,7,0,1,2,3,4,6
%N A053843 (Sum of digits of n written in base 8) modulo 8.
%C A053843 a(n) is the seventh row of the array in A141803. - _Andrey Zabolotskiy_, May 18 2016
%H A053843 G. C. Greubel, <a href="/A053843/b053843.txt">Table of n, a(n) for n = 0..5000</a>
%H A053843 Robert Walker, <a href="http://robertinventor.com/ftswiki/Self_Similar_Sloth_Canon_Number_Sequences">Self Similar Sloth Canon Number Sequences</a>
%F A053843 a(n) = A010877(A053829(n)). - _Andrey Zabolotskiy_, May 18 2016
%t A053843 Table[Mod[Plus @@ IntegerDigits[n, 8], 8], {n, 0, 50}] (* _G. C. Greubel_, Nov 02 2017 *)
%Y A053843 Cf. A010877, A053829, A141803.
%Y A053843 Cf. A010060, A053837-A053844.
%K A053843 base,nonn
%O A053843 0,3
%A A053843 _Henry Bottomley_, Mar 28 2000