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 A251099 #6 Jul 23 2025 13:04:11 %S A251099 12664,839758,53009570,3372537762,214512524583,13640572890821, %T A251099 867470863709067,55168625738829232,3508516188029302347, %U A251099 223126143031289738192,14189811432956928070475,902408000057785985299460 %N A251099 Number of (n+1)X(7+1) 0..1 arrays with no 2X2 subblock having its minimum diagonal element less than its minimum antidiagonal element. %C A251099 Column 7 of A251100 %H A251099 R. H. Hardin, <a href="/A251099/b251099.txt">Table of n, a(n) for n = 1..210</a> %e A251099 Some solutions for n=1 %e A251099 ..1..0..1..1..0..0..0..1....1..1..0..0..0..0..0..0....0..0..0..0..0..0..1..0 %e A251099 ..0..0..0..1..1..0..0..1....0..1..0..1..0..1..1..0....0..0..1..0..1..0..1..0 %K A251099 nonn %O A251099 1,1 %A A251099 _R. H. Hardin_, Nov 29 2014