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 A208569 #39 Dec 08 2024 02:27:08 %S A208569 1,1,2,1,4,2,3,1,8,4,5,2,7,3,6,1,16,8,9,4,13,5,12,2,15,7,10,3,14,6,11, %T A208569 1,32,16,17,8,25,9,24,4,29,13,20,5,28,12,21,2,31,15,18,7,26,10,23,3, %U A208569 30,14,19,6,27,11,22,1,64,32,33,16,49,17,48,8,57 %N A208569 Duplicate of A131271. %H A208569 Alois P. Heinz, <a href="/A208569/b208569.txt">Rows n = 1..13, flattened</a> %K A208569 dead %O A208569 1,3