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 A189267 #7 Jul 22 2025 11:39:23 %S A189267 32,1024,8985,65760,552752,4628486,38600001,319000548,2623974434, %T A189267 21494294205,175584444126,1431440887081,11653470772713,94780732526327, %U A189267 770355802817299,6258416803590102,50827354221378320,412701823824877427 %N A189267 Number of 5Xn binary arrays without the pattern 0 0 1 diagonally, antidiagonally or horizontally. %C A189267 Row 5 of A189264 %H A189267 R. H. Hardin, <a href="/A189267/b189267.txt">Table of n, a(n) for n = 1..200</a> %e A189267 Some solutions for 5X3 %e A189267 ..1..1..1....1..1..1....0..1..1....1..1..1....1..1..1....1..0..1....1..1..0 %e A189267 ..0..1..1....1..0..0....0..1..0....0..1..0....0..1..1....1..0..0....0..1..1 %e A189267 ..1..1..0....0..1..0....0..1..1....0..1..0....0..1..0....0..1..1....1..1..0 %e A189267 ..0..1..0....1..1..0....1..0..0....0..1..0....0..1..1....0..1..1....1..1..0 %e A189267 ..0..1..1....0..0..0....1..1..0....0..1..1....0..1..0....1..0..1....1..1..0 %K A189267 nonn %O A189267 1,1 %A A189267 _R. H. Hardin_ Apr 19 2011