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 A297205 #5 Feb 16 2025 08:33:52 %S A297205 0,1,1,1,41,1,2,1201,1201,2,3,36281,559647,36281,3,5,1094401, %T A297205 268870883,268870883,1094401,5,8,33014921,129026029705,2058903341490, %U A297205 129026029705,33014921,8,13,995960401,61919807546309,15748005991643285,15748005991643285,61919807546309,995960401,13 %N A297205 Array read by antidiagonals: T(m,n) = number of edge covers in the m X n king graph. %H A297205 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/EdgeCover.html">Edge Cover</a> %H A297205 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/KingGraph.html">King Graph</a> %e A297205 Array begins: %e A297205 ======================================================================== %e A297205 m\n| 1 2 3 4 5 %e A297205 ---|-------------------------------------------------------------------- %e A297205 1 | 0 1 1 2 3 ... %e A297205 2 | 1 41 1201 36281 1094401 ... %e A297205 3 | 1 1201 559647 268870883 129026029705 ... %e A297205 4 | 2 36281 268870883 2058903341490 15748005991643285 ... %e A297205 5 | 3 1094401 129026029705 15748005991643285 1919822469194024912961 ... %e A297205 ... %Y A297205 Main diagonal is A297056. %Y A297205 Cf. A286912. %K A297205 nonn,tabl %O A297205 1,5 %A A297205 _Andrew Howroyd_, Dec 26 2017