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 A163531 #9 Aug 28 2020 03:26:08 %S A163531 0,1,4,5,2,1,4,5,8,13,20,29,26,17,10,9,16,25,36,49,64,65,50,37,40,53, %T A163531 68,73,58,45,52,65,80,89,74,61,50,41,34,25,32,41,34,25,18,13,10,9,16, %U A163531 17,20,29,26,25,36,37,40,53,50,49,64,65,68,73,80,89,74,65,58,45,52,61 %N A163531 The square of the distance from the origin to the n-th point in the Peano curve A163334. %H A163531 Antti Karttunen, <a href="/A163531/b163531.txt">Table of n, a(n) for n = 0..59048</a> %F A163531 a(n) = A000290(A163528(n)) + A000290(A163529(n)). %Y A163531 See also: A163530, A163547. %K A163531 nonn %O A163531 0,3 %A A163531 _Antti Karttunen_, Aug 01 2009 %E A163531 Name corrected by _Kevin Ryde_, Aug 28 2020