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 A267793 #4 Jan 20 2016 12:35:15 %S A267793 20,400,8000,102954,1234716,13126812,132388406,1271314080,11831791048, %T A267793 107394660068,957081246026,8408442934462,73058790472446, %U A267793 629272663467509,5382292144211926,45776729662954256,387532677732355814 %N A267793 Number of 7Xn 0..1 arrays with every repeated value in every row greater than or equal to, and in every column greater than, the previous repeated value. %C A267793 Row 7 of A267788. %H A267793 R. H. Hardin, <a href="/A267793/b267793.txt">Table of n, a(n) for n = 1..210</a> %e A267793 Some solutions for n=4 %e A267793 ..1..1..0..1....0..0..0..1....1..1..1..0....0..0..0..1....0..0..0..0 %e A267793 ..0..0..1..0....1..1..1..0....0..0..0..0....1..0..1..0....1..1..0..1 %e A267793 ..1..1..0..1....0..0..0..0....0..1..1..1....0..1..0..1....0..0..1..0 %e A267793 ..1..0..0..0....0..1..0..1....1..0..0..0....1..0..1..0....1..1..0..1 %e A267793 ..0..1..1..1....1..0..1..1....0..0..0..1....0..1..0..0....0..0..1..0 %e A267793 ..1..0..0..1....0..1..0..0....1..1..1..0....1..1..1..1....0..0..0..1 %e A267793 ..0..1..1..0....1..0..1..1....1..0..1..1....1..0..1..1....1..1..1..1 %Y A267793 Cf. A267788. %K A267793 nonn %O A267793 1,1 %A A267793 _R. H. Hardin_, Jan 20 2016