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 A281799 #4 Jan 30 2017 10:39:07 %S A281799 3,157,1725,12318,71445,368408,1770697,8100180,35778250,153961577, %T A281799 648808393,2688490346,10985899831,44366461753,177379460528, %U A281799 703023818561,2765216924694,10803620128490,41957868667589,162081268856114 %N A281799 Number of nX5 0..1 arrays with no element unequal to a strict majority of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards. %C A281799 Column 5 of A281802. %H A281799 R. H. Hardin, <a href="/A281799/b281799.txt">Table of n, a(n) for n = 1..210</a> %H A281799 R. H. Hardin, <a href="/A281799/a281799_1.txt">Empirical recurrence of order 72</a> %F A281799 Empirical recurrence of order 72 (see link above) %e A281799 Some solutions for n=4 %e A281799 ..0..0..0..0..0. .0..0..1..0..1. .0..0..0..0..0. .0..0..0..0..0 %e A281799 ..1..1..1..0..1. .0..1..1..1..1. .0..1..0..1..0. .0..0..0..0..0 %e A281799 ..1..1..0..1..0. .0..0..1..1..0. .1..0..1..0..1. .1..1..1..1..1 %e A281799 ..1..0..1..0..1. .0..0..0..1..1. .1..1..0..1..1. .1..1..1..0..1 %Y A281799 Cf. A281802. %K A281799 nonn %O A281799 1,1 %A A281799 _R. H. Hardin_, Jan 30 2017