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 A341498 #8 Mar 13 2021 17:01:14 %S A341498 1,3,48,1566,126120,18153720,4357332000,1619499374640,883124275824000, %T A341498 677267024315091840,706022078404964428800,972890835488032591468800, %U A341498 1731258722423272253052441600,3900512495412914495014418918400,10938873545450798558110852249497600 %N A341498 Number of Hamiltonian cycles in the 3 X n rook graph. %H A341498 Andrew Howroyd, <a href="/A341498/b341498.txt">Table of n, a(n) for n = 1..30</a> %Y A341498 Column 3 of A269562. %K A341498 nonn %O A341498 1,2 %A A341498 _Andrew Howroyd_, Feb 21 2021