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 A269336 #6 Aug 12 2016 06:55:35 %S A269336 1,1,2,1,6,6,1,14,74,24,1,34,852,1880,120,1,78,10210,152922,80316,720, %T A269336 1,178,124466,13745475,62038644,5141864,5040,1,398,1539739,1301306034, %U A269336 55575194220,47286888510,458608016,40320,1,882,19271229,128342085219 %N A269336 T(n,k)=Number of nXk arrays containing k copies of 0..n-1 avoiding the pattern equal-up in every row and column. %C A269336 Table starts %C A269336 .....1.........1...........1...........1..............1............1........1 %C A269336 .....2.........6..........14..........34.............78..........178......398 %C A269336 .....6........74.........852.......10210.........124466......1539739.19271229 %C A269336 ....24......1880......152922....13745475.....1301306034.128342085219 %C A269336 ...120.....80316....62038644.55575194220.54180777470296 %C A269336 ...720...5141864.47286888510 %C A269336 ..5040.458608016 %C A269336 .40320 %H A269336 R. H. Hardin, <a href="/A269336/b269336.txt">Table of n, a(n) for n = 1..41</a> %e A269336 Some solutions for n=3 k=4 %e A269336 ..1..2..0..0. .1..2..1..2. .0..1..2..1. .2..1..0..0. .1..2..1..2 %e A269336 ..0..1..2..1. .0..2..0..0. .0..2..1..0. .2..0..1..2. .0..2..0..1 %e A269336 ..1..2..2..0. .2..0..1..1. .0..2..2..1. .1..0..1..2. .0..1..2..0 %Y A269336 Column 1 is A000142. %Y A269336 Row 2 is A059570(n+1). %K A269336 nonn,tabl %O A269336 1,3 %A A269336 _R. H. Hardin_, Feb 24 2016