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 A183311 #7 Aug 01 2023 17:44:55 %S A183311 34,90,2199,57249,2113257,71244598,2447317278,83828453334, %T A183311 2872365166632,98443712937832,3374443074400317,115681374040641527, %U A183311 3965953010347657340,135970823441576045577,4661739412614625916040,159827567992214512088271 %N A183311 Half the number of n X 10 binary arrays with no element equal to a strict majority of its horizontal and vertical neighbors. %C A183311 Column 10 of A183312. %H A183311 R. H. Hardin, <a href="/A183311/b183311.txt">Table of n, a(n) for n = 1..200</a> %e A183311 Some solutions with a(1,1)=0 for 10 X 4 %e A183311 ..0..1..0..1....0..0..1..0....0..1..0..0....0..1..1..0....0..1..0..1 %e A183311 ..1..0..0..1....1..1..0..1....1..0..1..1....1..0..0..1....0..1..1..0 %e A183311 ..1..0..1..0....0..1..0..0....1..0..1..0....0..1..0..0....1..0..0..1 %e A183311 ..0..1..1..0....1..0..1..1....0..1..0..1....1..0..1..1....0..1..1..0 %e A183311 ..1..0..0..1....0..1..1..0....1..0..0..1....0..1..1..0....1..0..0..1 %e A183311 ..1..0..0..1....0..1..0..1....0..1..1..0....1..0..0..1....0..1..0..1 %e A183311 ..0..1..1..0....1..0..1..0....1..0..1..0....0..1..1..0....0..1..1..0 %e A183311 ..1..0..1..0....1..0..1..1....1..0..1..1....1..1..0..1....1..0..0..1 %e A183311 ..1..0..1..1....0..1..0..0....0..1..0..0....0..0..1..0....0..1..1..0 %e A183311 ..0..1..0..0....0..1..0..1....0..1..0..1....1..1..0..1....0..1..0..1 %Y A183311 Cf. A183312. %K A183311 nonn %O A183311 1,1 %A A183311 _R. H. Hardin_, Jan 03 2011