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 A163009 #6 Jan 06 2023 23:21:55 %S A163009 1,1681,783150,250043151,71703384184,19934900617863,5483824484276487, %T A163009 1502037917021311844,410628432970492896401,112160245091369049581311, %U A163009 30623519350300448308681813,8359714215859160247276696744,2281871672070839340863159155338,622836891043514813722341456961744 %N A163009 Number of n X 9 binary arrays with all 1s connected and a path of 1s from upper left corner to lower right corner. %H A163009 Andrew Howroyd, <a href="/A163009/b163009.txt">Table of n, a(n) for n = 1..200</a> %Y A163009 Row 9 of A359573. %K A163009 nonn %O A163009 1,2 %A A163009 _R. H. Hardin_, Jul 20 2009 %E A163009 Terms a(8) and beyond from _Andrew Howroyd_, Jan 06 2023