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 A056632 #13 Apr 26 2022 20:55:01 %S A056632 4,12,48,188,740,2936,11672,46388,184352,732608,2911040,11565964, %T A056632 45949600,182538264,725108640,2880270032,11440564516,45441048384, %U A056632 180483666608,716832688844,2847012624636,11307166941460 %N A056632 a(n) is the total perimeter of all self-avoiding polygons of area n on the square lattice. %H A056632 I. Jensen, <a href="/A056632/b056632.txt">Table of n, a(n) for n = 1..40</a> (from link below) %H A056632 I. Jensen, <a href="http://www.ms.unimelb.edu.au/~iwan/polygons/series/square.peri_mom1.ser">More terms</a> %Y A056632 Cf. A002931, A056625. %K A056632 nonn %O A056632 1,1 %A A056632 _N. J. A. Sloane_, Aug 30 2000 %E A056632 Title clarified by _Sean A. Irvine_, Apr 26 2022