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 A296326 #4 Dec 10 2017 11:47:18 %S A296326 1,45,278,1677,14691,112235,850404,6660799,51754039,401363520, %T A296326 3119306759,24239641260,188341349284,1463488096858,11372085577974, %U A296326 88367785063892,686667612240495,5335806199766372,41462375276685856,322187049424431729 %N A296326 Number of nX7 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 2 neighboring 1s. %C A296326 Column 7 of A296327. %H A296326 R. H. Hardin, <a href="/A296326/b296326.txt">Table of n, a(n) for n = 1..210</a> %e A296326 Some solutions for n=5 %e A296326 ..1..1..0..0..0..1..1. .0..1..1..0..0..1..1. .0..1..0..0..0..0..0 %e A296326 ..1..0..0..0..1..0..1. .0..1..0..0..0..1..0. .1..1..0..0..0..0..0 %e A296326 ..0..0..0..0..1..0..1. .0..0..0..0..0..0..0. .0..0..0..1..1..0..0 %e A296326 ..0..1..1..0..1..1..0. .1..1..0..0..0..0..1. .0..0..1..0..1..0..1 %e A296326 ..0..1..0..0..0..0..0. .1..0..0..0..0..1..1. .0..0..1..1..0..1..1 %Y A296326 Cf. A296327. %K A296326 nonn %O A296326 1,2 %A A296326 _R. H. Hardin_, Dec 10 2017