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 A069384 #14 Apr 30 2024 17:04:09 %S A069384 511,242461,105683341,43843180113,17792504911231,7146486319870849, %T A069384 2856738227918860537,1139431807812280823353,454016084146597129480639, %U A069384 180827014727915133583355805,72007238386097441302774324845,28672084199736350940864453233905 %N A069384 Number of n X 9 binary arrays with a path of adjacent 1's from top row to bottom row. %H A069384 Sean A. Irvine, <a href="/A069384/b069384.txt">Table of n, a(n) for n = 1..200</a> %Y A069384 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 A069384 nonn %O A069384 1,1 %A A069384 _R. H. Hardin_, Mar 22 2002 %E A069384 More terms from _Sean A. Irvine_, Apr 30 2024