A212933 - OEIS

%I #4 May 31 2012 12:01:00

%S 1,255,518320,4041974015,85800824609376,4051316109991426752,

%T 372271852759802667094256,60525940157456181486116315391,

%U 16213293097463939456656505907266320

%N Number of 4Xn 0..n-1 arrays with no column j greater than column j-1 in all rows

%C Row 4 of A212930

%H R. H. Hardin, <a href="/A212933/b212933.txt">Table of n, a(n) for n = 1..16</a>

%e Some solutions for n=3

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

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ May 31 2012