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 A278383 #4 Nov 20 2016 07:42:22 %S A278383 1,1350,100807,4703562,179716850,6204309386,198563803019, %T A278383 5851197688577,157794170262819,3912513274701995,90233123783207419, %U A278383 1960361831058212555,40518771843257636636,801152317698519068308,15177259705860270641696 %N A278383 Number of nX6 0..1 arrays with rows and columns in lexicographic nondecreasing order but with exactly three mistakes. %C A278383 Column 6 of A278385. %H A278383 R. H. Hardin, <a href="/A278383/b278383.txt">Table of n, a(n) for n = 1..153</a> %e A278383 Some solutions for n=3 %e A278383 ..1..1..1..1..1..0. .1..1..0..0..1..1. .1..0..1..0..1..1. .1..1..0..1..1..0 %e A278383 ..0..0..0..0..0..1. .0..0..0..1..0..1. .0..1..1..0..0..1. .0..0..1..0..1..0 %e A278383 ..1..0..0..0..0..0. .1..0..0..1..1..1. .0..1..1..1..0..0. .0..1..0..0..1..1 %Y A278383 Cf. A278385. %K A278383 nonn %O A278383 1,2 %A A278383 _R. H. Hardin_, Nov 20 2016