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 A069326 #11 Jan 07 2023 14:00:56 %S A069326 1,20,295,3828,46557,546286,6279393,71316632,804230945,9031118936, %T A069326 101161197895,1131456031256,12643706576681,141214773950750, %U A069326 1576695869980497,17600838146781308,196457931325141165 %N A069326 Number of 4 X n binary arrays with path of adjacent 1's from upper right corner to lower left corner. %Y A069326 Row 4 of A359575. %Y A069326 Cf. 2 X n A048739, 3 X n A069325, 5 X n A069327, 6 X n A069328, 7 X n A069329, 8 X n A069330, 9 X n A069331, 10 X n A069332, 11 X n A069333, 12 X n A069334, 13 X n A069335, 14 X n A069336, 15 X n A069337, 16 X n A069338, 17 X n A069339, 18 X n A069340, 19 X n A069341, 20 X n A069342, n X n A069343, n X n symmetric A069344. %K A069326 nonn %O A069326 1,2 %A A069326 _R. H. Hardin_, Mar 16 2002