A219306 - OEIS

%I #4 Nov 17 2012 13:07:18

%S 7,51,423,3334,25647,200376,1574278,12334824,96480571,755212375,

%T 5914093280,46306103745,362524633360,2838264260603,22221912955624,

%U 173982894127917,1362160216940837,10664747935404835,83497581682654109

%N Unchanging value maps: number of nX4 binary arrays indicating the locations of corresponding elements unequal to no horizontal or vertical neighbor in a random 0..2 nX4 array

%C Column 4 of A219310

%H R. H. Hardin, <a href="/A219306/b219306.txt">Table of n, a(n) for n = 1..48</a>

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Nov 17 2012