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 A279976 #6 Apr 20 2021 14:55:34 %S A279976 15,277,8068,226771,5870751,144819856,3444870482,79672440007, %T A279976 1801951754910,40020022178950,875485447655303,18909516686710743, %U A279976 403990472666974061,8549840572786983933,179455644823143101693 %N A279976 Number of n X 7 0..1 arrays with no element equal to a strict majority of its horizontal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards. %C A279976 Column 7 of A279977. %H A279976 R. H. Hardin, <a href="/A279976/b279976.txt">Table of n, a(n) for n = 1..82</a> %e A279976 Some solutions for n=3 %e A279976 ..0..0..1..0..1..0..1. .0..0..1..0..1..0..1. .0..0..1..0..1..1..0 %e A279976 ..1..1..0..1..0..0..1. .1..0..0..1..1..0..1. .1..1..0..0..1..1..0 %e A279976 ..0..1..1..1..0..1..0. .0..1..0..0..1..1..0. .0..1..1..0..0..1..0 %Y A279976 Cf. A279977. %K A279976 nonn %O A279976 1,1 %A A279976 _R. H. Hardin_, Dec 24 2016