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 A289904 #9 Feb 16 2025 08:33:49 %S A289904 0,0,1,16,4913,13481272,272624565213,43591165915025672, %T A289904 54987285852263666792584,546490452644177272846400450304, %U A289904 42801199124555963417196629935933733033,26416976791435052534725445524174519235494961992 %N A289904 Number of edge covers in the n-triangular honeycomb acute knight graph. %H A289904 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/EdgeCover.html">Edge Cover</a> %Y A289904 Cf. A287230, A289906. %K A289904 nonn %O A289904 1,4 %A A289904 _Eric W. Weisstein_, Jul 14 2017 %E A289904 a(10)-a(12) from _Andrew Howroyd_, Dec 26 2017