A212949 - OEIS

%I #4 May 31 2012 13:03:56

%S 1,14197,9245913139,64146409058631061,2592491557886605293297751,

%T 427593510370812774462812710051387,

%U 227328735342370296661661894900118524516359

%N Number of 7Xn 0..n-1 arrays with no column j greater than or equal to than column j-1 in all rows

%C Row 7 of A212943

%H R. H. Hardin, <a href="/A212949/b212949.txt">Table of n, a(n) for n = 1..17</a>

%e Some solutions for n=4

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

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

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

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

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ May 31 2012