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 A069391 #9 Apr 07 2021 18:48:36 %S A069391 65535,4251920575,264152863210065,15574913193760097649, %T A069391 884176137127765554601535 %N A069391 Number of n X 16 binary arrays with a path of adjacent 1's from top row to bottom row. %Y A069391 Cf. 1 X n A000225, 2 X n A005061, n X 2 A001333, vertical path of 1 A069361-A069395, vertical paths of 0+1 A069396-A069416, vertical path of 1 not 0 A069417-A069428, no vertical paths A069429-A069447, no horizontal or vertical paths A069448-A069452. %K A069391 nonn %O A069391 1,1 %A A069391 _R. H. Hardin_, Mar 22 2002