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 A341849 #7 Mar 14 2021 18:44:54 %S A341849 1,3,40,852,22368,822528,38772864,2462728320,189512165376, %T A341849 18739021676544,2147802505795584,305748136551647232, %U A341849 48922389407097077760,9484975881651606847488,2021636445616137313124352,512419728510195503179825152,140423343538080744846410121216 %N A341849 Number of maximal matchings in the 4 X n rook graph. %H A341849 Andrew Howroyd, <a href="/A341849/b341849.txt">Table of n, a(n) for n = 0..30</a> %Y A341849 Row n=4 of A341847. %K A341849 nonn %O A341849 0,2 %A A341849 _Andrew Howroyd_, Feb 21 2021