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 A188870 #7 Mar 17 2023 02:16:03 %S A188870 24,576,11332,233756,4805140,98892196,2035428944,41894114820, %T A188870 862288002496,17748103310980,365301608074080,7518846739068100, %U A188870 154757206783943744,3185301402740998148,65561696535791184736 %N A188870 Number of n X 5 binary arrays without the pattern 0 0 0 antidiagonally or horizontally. %C A188870 Column 5 of A188874. %H A188870 R. H. Hardin, <a href="/A188870/b188870.txt">Table of n, a(n) for n = 1..200</a> %F A188870 Empirical: a(n) = 24*a(n-1) -67*a(n-2) -48*a(n-3) -540*a(n-4) +2272*a(n-5) +1536*a(n-6) -6944*a(n-7) +2864*a(n-8) +1600*a(n-9) -768*a(n-10) for n>12. %e A188870 Some solutions for 3 X 5 %e A188870 ..1..0..1..1..0....0..1..0..1..1....1..0..1..1..1....0..1..0..0..1 %e A188870 ..0..1..1..0..1....1..1..1..1..0....0..0..1..0..1....0..1..1..1..1 %e A188870 ..1..0..1..1..0....1..1..0..1..0....1..1..1..0..0....1..1..1..1..0 %Y A188870 Cf. A188874. %K A188870 nonn %O A188870 1,1 %A A188870 _R. H. Hardin_, Apr 12 2011