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 A278805 #4 Nov 28 2016 13:35:11 %S A278805 28,672,20972,870473,41299256,1976588468,89730161098,3776527762052, %T A278805 146582077597322,5255148833158068,174697385422916429, %U A278805 5408652963998274118,156617481905320805788,4258375831859896074183,109105728055490259454053 %N A278805 Number of nX6 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order. %C A278805 Column 6 of A278807. %H A278805 R. H. Hardin, <a href="/A278805/b278805.txt">Table of n, a(n) for n = 1..48</a> %e A278805 Some solutions for n=3 %e A278805 ..1..0..0..0..0..0. .1..1..0..0..0..0. .1..1..1..0..0..0. .1..1..1..0..0..0 %e A278805 ..1..2..2..2..0..0. .1..1..2..1..0..0. .2..2..0..1..1..1. .2..0..0..2..1..1 %e A278805 ..2..1..1..1..1..1. .2..0..1..0..0..0. .2..2..2..2..0..0. .2..1..1..0..2..0 %Y A278805 Cf. A278807. %K A278805 nonn %O A278805 1,1 %A A278805 _R. H. Hardin_, Nov 28 2016