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 A163002 #12 Jan 30 2023 21:05:54 %S A163002 1,3,45,2423,482443,360923899,1012326365581,10583931453268587, %T A163002 410628432970492896401,58940807698860767759080097, %U A163002 31235684611422395105793077154373,61025622782775877079925551890952450707,439058030866550268551946597005515209497083151 %N A163002 Number of n X n binary arrays with all 1s connected and a path of 1s from upper left corner to lower right corner. %H A163002 Andrew Howroyd, <a href="/A163002/b163002.txt">Table of n, a(n) for n = 1..15</a> %Y A163002 Main diagonal of A359573. %K A163002 nonn %O A163002 1,2 %A A163002 _R. H. Hardin_, Jul 20 2009 %E A163002 a(8)-a(11) from _Andrew Howroyd_, Jan 06 2023 %E A163002 Terms a(12) and beyond from _Andrew Howroyd_, Jan 30 2023