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 A297056 #8 Feb 16 2025 08:33:52 %S A297056 0,41,559647,2058903341490,1919822469194024912961, %T A297056 454793583387514185843536081792977, %U A297056 27368974025724800737173203530619000355806000376,418403166660689804867337021992321072270266489726877793864921013 %N A297056 Number of edge covers in the n X n king graph. %H A297056 Andrew Howroyd, <a href="/A297056/b297056.txt">Table of n, a(n) for n = 1..20</a> %H A297056 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/EdgeCover.html">Edge Cover</a> %H A297056 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/KingGraph.html">King Graph</a> %Y A297056 Main diagonal of A297205. %K A297056 nonn %O A297056 1,2 %A A297056 _Eric W. Weisstein_, Dec 24 2017 %E A297056 Terms a(4) and beyond from _Andrew Howroyd_, Dec 26 2017