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 A069379 #18 Apr 30 2024 16:29:58 %S A069379 15,175,1985,22193,247759,2764991,30856705,344356289,3842988975, %T A069379 42887577455,478623939553,5341429762353,59610217019311, %U A069379 665248512113343,7424156719466465,82853403589520257,924641917817567951 %N A069379 Number of n X 4 binary arrays with a path of adjacent 1's from top row to bottom row. %H A069379 Sean A. Irvine, <a href="/A069379/b069379.txt">Table of n, a(n) for n = 1..200</a> %Y A069379 Column 4 of A359576. %Y A069379 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 A069379 nonn %O A069379 1,1 %A A069379 _R. H. Hardin_, Mar 22 2002