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 A163031 #9 Jan 06 2023 23:22:13 %S A163031 15,245,5191,104989,2075271,40792921,801218515,15736428305, %T A163031 309080891641,6070750256417,119237718452471,2341990743046197, %U A163031 45999883370408813,903500281246849523,17745974522766912147,348555078644003475079 %N A163031 Number of n X 5 binary arrays with all 1s connected and a path of 1s from top row to bottom row. %H A163031 R. H. Hardin, <a href="/A163031/b163031.txt">Table of n, a(n) for n=1..21</a> %H A163031 Chaim Goodman-Strauss, <a href="/A163029/a163029.pdf">Notes on the number of m × n binary arrays with all 1’s connected and a path of 1’s from top row to bottom row</a> (May 21 2020) %H A163031 Chaim Goodman-Strauss, <a href="/A163029/a163029.nb">Mma notebook to accompany the above document</a> %F A163031 For a formula see the Goodman-Strauss links. - _N. J. A. Sloane_, May 22 2020 %Y A163031 Column 5 of A359574. %Y A163031 Cf. A163029-A163036. %K A163031 nonn %O A163031 1,1 %A A163031 _R. H. Hardin_, Jul 20 2009