A212944 - OEIS

%I #4 May 31 2012 13:00:13

%S 1,7,181,10311,1016501,152747323,32383630189,9192184928839,

%T 3362887443335365,1540205755192368507,863047803911184565037,

%U 580733337119861320815291,462049013032247252827284109

%N Number of 2Xn 0..n-1 arrays with no column j greater than or equal to than column j-1 in all rows

%C Row 2 of A212943

%H R. H. Hardin, <a href="/A212944/b212944.txt">Table of n, a(n) for n = 1..19</a>

%e Some solutions for n=4

%e ..1..1..2..2....1..0..3..3....3..3..0..3....0..1..0..1....0..0..1..3

%e ..3..2..1..0....1..3..2..0....1..0..2..0....3..2..3..1....3..2..1..0

%K nonn

%O 1,2

%A _R. H. Hardin_ May 31 2012