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 A069339 #10 Apr 28 2024 21:24:28 %S A069339 1,1940449,815197197636,196457931325141165,36372152593010317662845, %T A069339 5818327780447717536274778137,850379363772262706448823961065710, %U A069339 116965045557462347093874185317348234955,15400621481550701604975389442540432375789212 %N A069339 Number of 17 X n binary arrays with path of adjacent 1's from upper right corner to lower left corner. %Y A069339 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, 13 X n A069335, 14 X n A069336, 15 X n A069337, 16 X n A069338, 18 X n A069340, 19 X n A069341, 20 X n A069342, n X n A069343, n X n symmetric A069344. %K A069339 nonn,more %O A069339 1,2 %A A069339 _R. H. Hardin_, Mar 16 2002 %E A069339 a(6)-a(9) from _Sean A. Irvine_, Apr 28 2024