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 A229798 #6 Jul 23 2025 05:47:32 %S A229798 24520,318174607,348053502590,83399309397669,7470491620551006, %T A229798 337176110123479647,9191448163080152260,170263099219981493623, %U A229798 2323791090717304237514,24760438397023153230241,214990023150964441381574 %N A229798 Number of 5X5 0..n arrays with rows and columns in lexicographically nondecreasing order. %C A229798 Row 5 of A229794 %H A229798 R. H. Hardin, <a href="/A229798/b229798.txt">Table of n, a(n) for n = 1..17</a> %e A229798 Some solutions for n=1 %e A229798 ..0..0..0..0..1....0..0..0..0..1....0..0..0..0..1....0..0..1..1..1 %e A229798 ..0..0..0..1..0....0..0..0..1..1....0..0..1..1..1....0..1..0..0..1 %e A229798 ..0..1..1..1..0....0..0..1..0..0....0..1..0..0..1....1..0..0..0..0 %e A229798 ..0..1..1..1..0....0..1..0..1..0....0..1..1..1..1....1..0..0..1..0 %e A229798 ..1..0..0..1..1....1..1..1..0..0....1..0..0..0..0....1..1..1..0..0 %K A229798 nonn %O A229798 1,1 %A A229798 _R. H. Hardin_, Sep 29 2013