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 A281709 #6 Apr 21 2020 13:03:34 %S A281709 1,3,8,97,937,29849,1721319,178547832,41247350230,17968646792801 %N A281709 Number of n X n 0..1 arrays with no element unequal to a strict majority of its horizontal, diagonal and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards. %C A281709 Diagonal of A281715. %e A281709 Some solutions for n=4 %e A281709 ..0..0..0..0. .0..1..0..1. .0..0..1..0. .0..0..1..1. .0..0..0..1 %e A281709 ..0..0..1..1. .1..0..1..0. .0..1..0..1. .1..1..0..0. .1..1..1..0 %e A281709 ..0..1..1..1. .1..1..0..1. .1..0..1..0. .1..1..0..0. .1..1..0..0 %e A281709 ..0..0..1..1. .1..1..1..0. .0..1..0..1. .1..1..0..0. .1..0..0..0 %Y A281709 Cf. A281715. %K A281709 nonn %O A281709 1,2 %A A281709 _R. H. Hardin_, Jan 28 2017