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 A181222 #5 Jul 22 2025 08:36:49 %S A181222 44,1936,34020,845531,21513936,507962194,12297765846,298705742479, %T A181222 7214603356059,174532135006271,4223718879095262,102172834596986892, %U A181222 2471821868183143126,59801751244062857757,1446764589780206695039 %N A181222 Number of nX6 binary matrices with no three 1's adjacent in a line horizontally, vertically, diagonally or antidiagonally. %C A181222 Column 6 of A181224 %H A181222 R. H. Hardin, <a href="/A181222/b181222.txt">Table of n, a(n) for n=1..200</a> %e A181222 Some avoided solutions for 3X6 %e A181222 ..0..0..0..1..1..0....0..0..0..0..1..0....1..0..1..1..1..0....0..1..0..0..0..0 %e A181222 ..0..0..1..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0....0..0..1..1..0..0 %e A181222 ..0..1..0..0..0..0....0..0..1..1..1..0....0..0..0..0..0..0....0..0..0..1..0..0 %K A181222 nonn %O A181222 1,1 %A A181222 _R. H. Hardin_ Oct 10 2010