|
%I
%S 422,1705124,3790420430,7574530822364,15712898935252156,
%T 32766523337754473494,68145439667266350435686,
%U 141695919109060311625392330,294680177794961913094327501892
%N Number of nX6 0..3 arrays with every nonzero element less than or equal to some horizontal or vertical neighbor
%C Column 6 of A203101
%H R. H. Hardin, <a href="/A203099/b203099.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=5
%e ..1..1..0..1..1..0....3..3..3..3..0..1....1..2..3..1..0..1....2..3..3..2..2..2
%e ..3..0..2..1..1..0....2..0..2..1..1..1....3..3..3..3..2..1....2..2..1..1..1..2
%e ..3..1..3..1..0..2....3..2..1..1..0..1....1..2..2..0..0..2....2..3..0..1..2..2
%e ..0..1..3..0..2..2....3..0..2..1..1..0....1..1..2..2..0..2....0..3..3..3..2..1
%e ..0..2..3..3..1..0....2..0..3..3..2..1....3..3..2..1..2..2....2..2..1..2..1..1
%K nonn
%O 1,1
%A _R. H. Hardin_ Dec 29 2011
| 