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 A069335 #11 Apr 28 2024 09:50:53 %S A069335 1,57121,1043751584,12643706576681,126017939209370356, %T A069335 1125283073890577118094,9370213923827917022436855, %U A069335 74336348859792978822695533158,569069897400777230243560762294416,4238919196076677072267006057045464865,30902027517838776937964167308887338619805 %N A069335 Number of 13 X n binary arrays with path of adjacent 1's from upper right corner to lower left corner. %Y A069335 Cf. 2 X n A048739, 3 X n A069325, 4 X n A069326, 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, 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 A069335 nonn %O A069335 1,2 %A A069335 _R. H. Hardin_, Mar 16 2002 %E A069335 a(6)-a(11) from _Sean A. Irvine_, Apr 28 2024