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 A163528 #27 Aug 13 2023 22:41:02 %S A163528 0,1,2,2,1,0,0,1,2,3,4,5,5,4,3,3,4,5,6,7,8,8,7,6,6,7,8,8,7,6,6,7,8,8, %T A163528 7,6,5,4,3,3,4,5,5,4,3,2,1,0,0,1,2,2,1,0,0,1,2,2,1,0,0,1,2,3,4,5,5,4, %U A163528 3,3,4,5,6,7,8,8,7,6,6,7,8,9,10,11,11,10,9,9,10,11,12,13,14,14,13,12 %N A163528 The X-coordinate of the n-th point in the Peano curve A163334. %C A163528 There is a 2-state automaton that accepts exactly those pairs (n,a(n)) where n is represented in base 9 and a(n) in base 3; see accompanying file a163528.pdf - _Jeffrey Shallit_, Aug 10 2023 %H A163528 Antti Karttunen, <a href="/A163528/b163528.txt">Table of n, a(n) for n = 0..59048</a> %H A163528 Jeffrey Shallit, <a href="/A163528/a163528.pdf">Automaton for A163528</a> %H A163528 <a href="/index/Con#coordinates_2D_curves">Index entries for sequences related to coordinates of 2D curves</a> %F A163528 a(n) = A025581(A163335(n)) = A002262(A163337(n)) = A163325(A163332(n)). %Y A163528 Cf. A025581, A163335, A002262, A163337, A163325, A163332. %Y A163528 See also: A059252, A059253, A163529, A163530, A163531, A163532. %K A163528 nonn %O A163528 0,3 %A A163528 _Antti Karttunen_, Aug 01 2009 %E A163528 Name corrected by _Kevin Ryde_, Aug 28 2020