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 A268205 #4 Jan 28 2016 16:04:44 %S A268205 2,9,60,570,6960,104006,1837752,37478718,866361210,22384298772, %T A268205 639235846656,19993319047663,679693673292816,24954856965472485, %U A268205 984056034148827632,41479800266522142954,1861205533117885580022 %N A268205 Number of 1Xn 0..n arrays with every repeated value in every row and column greater than the previous repeated value. %C A268205 Row 1 of A268204. %H A268205 R. H. Hardin, <a href="/A268205/b268205.txt">Table of n, a(n) for n = 1..193</a> %e A268205 Some solutions for n=6 %e A268205 ..4..1..5..1..3..3....4..2..6..4..4..0....5..0..0..6..5..0....3..1..2..6..1..3 %Y A268205 Cf. A268204. %K A268205 nonn %O A268205 1,1 %A A268205 _R. H. Hardin_, Jan 28 2016