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 A069343 #15 Apr 29 2024 09:08:05 %S A069343 1,3,51,3828,1225194,1636193228,9009490924794,203037531986079710, %T A069343 18633578769242938930634,6939491897974410047045467672, %U A069343 10460300685270373054347943215411456,63693144523237155451684426136374621458792,1564268765712262926681452283892583850491065259004 %N A069343 Number of n X n binary arrays with path of adjacent 1's from upper right corner to lower left corner. %Y A069343 Cf. m X n A069325-A069342, n X n symmetric A069344. %Y A069343 Main diagonal of A359575. %K A069343 nonn %O A069343 1,2 %A A069343 _R. H. Hardin_, Mar 16 2002 %E A069343 a(8)-a(13) from _Sean A. Irvine_, Apr 29 2024