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 A358698 #13 Nov 27 2022 10:30:24 %S A358698 1,21,408,6410,113748,2002405,35669433,633099244,11240647480, %T A358698 199480271184,3540336868535,62831861216325,1115122033297714, %U A358698 19790829247392636,351241699540793996,6233729269914805533,110634310753645173365,1963503651093439655818,34847658208568166865562,618465506517313482341986 %N A358698 Number of self-avoiding closed paths in the 7 X n grid graph which pass through all vertices on four (left, right, upper, lower) sides of the graph. %H A358698 Seiichi Manyama, <a href="/A358698/b358698.txt">Table of n, a(n) for n = 2..50</a> %Y A358698 Row 7 of A333758. %K A358698 nonn %O A358698 2,2 %A A358698 _Seiichi Manyama_, Nov 27 2022