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 A278722 #4 Nov 27 2016 06:47:35 %S A278722 20,275,3232,33466,306070,2487889,18151220,120104810,727684612, %T A278722 4070893254,21181152380,103146867706,472709673984,2048611972127, %U A278722 8431440391174,33079800818118,124138709933301,446936241587393 %N A278722 Number of nX3 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order. %C A278722 Column 3 of A278727. %H A278722 R. H. Hardin, <a href="/A278722/b278722.txt">Table of n, a(n) for n = 1..210</a> %H A278722 R. H. Hardin, <a href="/A278722/a278722.txt">Empirical polynomial of degree 45</a> %F A278722 Empirical polynomial of degree 45 (see link above) %e A278722 Some solutions for n=4 %e A278722 ..0..0..0. .2..0..0. .1..0..0. .1..0..0. .2..1..0. .1..0..0. .1..1..0 %e A278722 ..1..1..0. .2..1..1. .2..0..0. .1..3..2. .2..1..0. .1..1..0. .2..1..0 %e A278722 ..2..2..2. .2..2..2. .3..2..1. .3..1..3. .2..1..2. .2..2..3. .2..3..3 %e A278722 ..3..0..2. .2..2..2. .3..3..1. .3..3..2. .2..3..3. .3..3..0. .3..1..0 %Y A278722 Cf. A278727. %K A278722 nonn %O A278722 1,1 %A A278722 _R. H. Hardin_, Nov 27 2016