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 A163340 #8 Aug 28 2020 02:21:17 %S A163340 1,6,2,7,5,3,48,8,4,16,49,47,9,15,17,54,50,46,10,14,18,55,53,51,45,11, %T A163340 13,19,60,56,52,40,44,12,24,20,61,59,57,39,41,43,25,23,21,426,62,58, %U A163340 70,38,42,30,26,22,142,427,425,63,69,71,37,31,29,27,141,143,432,428 %N A163340 Peano curve in an N x N grid, one-based, starting downwards from the top-left corner. %C A163340 See the comments at A163336. %H A163340 Antti Karttunen, <a href="/A163340/b163340.txt">Table of n, a(n) for n = 1..3321</a> %H A163340 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %F A163340 a(n) = A163336(n-1)+1 %Y A163340 Inverse: A163341. Transpose: A163338. %K A163340 nonn,tabl %O A163340 1,2 %A A163340 _Antti Karttunen_, Jul 29 2009 %E A163340 Name corrected by _Kevin Ryde_, Aug 28 2020