|
%I #5 Mar 31 2012 12:36:56
%S 1,95,9555,503409,23912553,1288066857,72606563663,4048732987777,
%T 224803736954347,12536125586656167,701080855015785026,
%U 39228019277755257087,2195365093327710655400,122904723679862273403598
%N Number of nX4 0..4 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors
%C Column 4 of A203346
%H R. H. Hardin, <a href="/A203342/b203342.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=5
%e ..1..4..4..0....4..4..0..0....4..4..1..0....4..4..1..0....2..4..4..2
%e ..3..4..4..1....4..4..3..2....4..4..2..1....4..4..3..0....2..4..4..2
%e ..3..3..1..1....2..3..4..4....1..4..2..1....4..2..3..0....0..3..0..0
%e ..0..0..2..2....3..4..4..4....2..4..4..4....4..4..4..0....1..4..4..4
%e ..0..0..2..2....3..4..4..3....2..3..4..4....1..4..4..0....1..4..4..4
%K nonn
%O 1,2
%A _R. H. Hardin_ Dec 31 2011
| 