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 A184142 #7 Jul 22 2025 09:28:41 %S A184142 8,92,1682,42305,1202234,33345183,836488618,18470742266,358194085968, %T A184142 6148026957098,94402700488339,1310734458313359,16616390002366515, %U A184142 193963806947349704,2100034143080950846,21221195503865955621 %N A184142 Number of nX7 binary arrays with rows and columns in nondecreasing order. %C A184142 Column 7 of A180985 %H A184142 R. H. Hardin, <a href="/A184142/b184142.txt">Table of n, a(n) for n = 1..200</a> %e A184142 Some solutions for 3X7 %e A184142 ..0..0..0..0..0..0..1....0..0..0..0..0..1..1....0..0..1..1..1..1..1 %e A184142 ..0..1..1..1..1..1..1....0..0..0..0..0..1..1....0..1..0..0..0..1..1 %e A184142 ..1..0..0..0..1..1..1....0..1..1..1..1..0..0....1..1..1..1..1..0..0 %K A184142 nonn %O A184142 1,1 %A A184142 _R. H. Hardin_ Jan 09 2011