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 A278852 #4 Nov 29 2016 10:26:46 %S A278852 0,239,15066,449677,9317846,154090507,2167109763,26799758534, %T A278852 297417275848,3004658410735,27940725989130,241350612592135, %U A278852 1951440294582041,14865802497447044,107290958051308517 %N A278852 Number of nX5 0..1 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly three mistakes. %C A278852 Column 5 of A278855. %H A278852 R. H. Hardin, <a href="/A278852/b278852.txt">Table of n, a(n) for n = 1..210</a> %H A278852 R. H. Hardin, <a href="/A278852/a278852.txt">Empirical polynomial of degree 101</a> %F A278852 Empirical polynomial of degree 101 (see link above) %e A278852 Some solutions for n=3 %e A278852 ..1..0..0..1..0. .1..1..0..1..0. .0..0..0..1..1. .1..1..0..0..0 %e A278852 ..1..0..0..0..1. .0..1..0..1..1. .1..1..1..1..0. .0..1..0..1..0 %e A278852 ..1..0..1..1..1. .1..1..1..1..0. .0..0..1..1..0. .1..1..1..1..0 %Y A278852 Cf. A278855. %K A278852 nonn %O A278852 1,2 %A A278852 _R. H. Hardin_, Nov 29 2016