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 A297800 #4 Jan 06 2018 09:31:14 %S A297800 1,105,1320,16006,320168,5511367,91376524,1587468720,27421636815, %T A297800 470544728613,8106158053425,139669854334501,2404648275368779, %U A297800 41411751712923850,713227235336676149,12282835762563772060 %N A297800 Number of nX6 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2, 3 or 5 neighboring 1s. %C A297800 Column 6 of A297802. %H A297800 R. H. Hardin, <a href="/A297800/b297800.txt">Table of n, a(n) for n = 1..210</a> %e A297800 Some solutions for n=4 %e A297800 ..0..0..0..0..1..1. .0..1..0..1..0..0. .0..1..1..0..1..0. .0..1..1..0..0..0 %e A297800 ..0..0..0..0..1..1. .1..1..1..1..1..0. .1..1..0..1..0..1. .1..1..0..1..1..0 %e A297800 ..1..1..0..0..1..0. .1..1..0..0..1..1. .1..1..0..0..1..1. .0..0..1..0..0..1 %e A297800 ..1..1..1..1..0..0. .1..1..1..1..1..0. .0..0..1..1..1..1. .0..0..0..1..1..0 %Y A297800 Cf. A297802. %K A297800 nonn %O A297800 1,2 %A A297800 _R. H. Hardin_, Jan 06 2018