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 A069425 #13 Aug 23 2024 08:39:46 %S A069425 1,211,9539,300651,8168645,206458895,5022868187,119647195507, %T A069425 2816023729437,65818825735031,1532136293558119,35579894275049831, %U A069425 825082170362304285,19117256012937548815,442728846445605819023,10249950234312030878755,237262687880593853560805 %N A069425 Number of n X 5 binary arrays with a path of adjacent 1's and no path of adjacent 0's from top row to bottom row. %F A069425 a(n) = A069380(n) - 2 * A069405(n). - _Sean A. Irvine_, Aug 23 2024 %Y A069425 Cf. 2 X n A001047, n X 2 A034182, 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 A069425 nonn %O A069425 1,2 %A A069425 _R. H. Hardin_, Mar 22 2002 %E A069425 More terms from _Sean A. Irvine_, Aug 23 2024