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 A278776 #4 Nov 28 2016 08:21:31 %S A278776 21,1750,48501,955347,16205001,251740932,3634987413,48847405083, %T A278776 611199661843,7140933364136,78280456105686,809842005695656, %U A278776 7953581118077240,74557744904209329,670158115881138987 %N A278776 Number of nX6 0..1 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly two mistakes. %C A278776 Column 6 of A278778. %H A278776 R. H. Hardin, <a href="/A278776/b278776.txt">Table of n, a(n) for n = 1..153</a> %H A278776 R. H. Hardin, <a href="/A278776/a278776.txt">Empirical polynomial of degree 134</a> %F A278776 Empirical polynomial of degree 134 (see link above) %e A278776 Some solutions for n=3 %e A278776 ..1..0..0..0..1..1. .1..0..0..1..1..0. .1..0..1..1..1..1. .0..0..0..1..0..0 %e A278776 ..0..1..0..0..1..1. .0..1..0..1..0..0. .1..1..1..1..1..0. .1..1..0..1..0..1 %e A278776 ..1..1..0..0..1..1. .1..0..1..0..0..0. .0..0..0..0..0..0. .1..1..1..0..1..1 %Y A278776 Cf. A278778. %K A278776 nonn %O A278776 1,1 %A A278776 _R. H. Hardin_, Nov 28 2016