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 A053844 #16 Aug 09 2024 05:09:10 %S A053844 0,1,2,3,4,5,6,7,8,1,2,3,4,5,6,7,8,0,2,3,4,5,6,7,8,0,1,3,4,5,6,7,8,0, %T A053844 1,2,4,5,6,7,8,0,1,2,3,5,6,7,8,0,1,2,3,4,6,7,8,0,1,2,3,4,5,7,8,0,1,2, %U A053844 3,4,5,6,8,0,1,2,3,4,5,6,7,1,2,3,4,5,6,7,8,0,2,3,4,5,6,7,8,0,1,3,4,5,6,7,8 %N A053844 (Sum of digits of n written in base 9) modulo 9. %H A053844 Paolo Xausa, <a href="/A053844/b053844.txt">Table of n, a(n) for n = 0..10000</a> %H A053844 Robert Walker, <a href="http://robertinventor.com/ftswiki/Self_Similar_Sloth_Canon_Number_Sequences">Self Similar Sloth Canon Number Sequences</a> %F A053844 a(n) = A010878(A053830(n)). - _Paolo Xausa_, Aug 09 2024 %t A053844 Mod[DigitSum[Range[0, 100], 9], 9] (* _Paolo Xausa_, Aug 09 2024 *) %Y A053844 Eighth row of the array in A141803. %Y A053844 Cf. A010878, A053830. %Y A053844 Cf. A010060, A053837-A053843. %K A053844 base,nonn %O A053844 0,3 %A A053844 _Henry Bottomley_, Mar 28 2000