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%I #4 Nov 17 2012 13:06:41
%S 4,18,90,423,1958,9233,43725,206269,971794,4583164,21622807,101988408,
%T 481001317,2268654909,10700463129,50469641870,238042556300,
%U 1122743524739,5295505220276,24976631418525,117804014337453,555630918690165
%N Unchanging value maps: number of nX3 binary arrays indicating the locations of corresponding elements unequal to no horizontal or vertical neighbor in a random 0..2 nX3 array
%C Column 3 of A219310
%H R. H. Hardin, <a href="/A219305/b219305.txt">Table of n, a(n) for n = 1..95</a>
%F Empirical: a(n) = 4*a(n-1) +a(n-2) +7*a(n-3) +35*a(n-4) -60*a(n-5) -68*a(n-6) +93*a(n-7) -72*a(n-8) -111*a(n-9) +101*a(n-10) -21*a(n-11) -28*a(n-12) +32*a(n-13) +2*a(n-14) +6*a(n-15) +8*a(n-16)
%e Some solutions for n=3
%e ..1..0..1....0..0..0....1..1..1....1..1..1....0..0..1....0..0..0....0..0..1
%e ..0..0..0....0..0..0....0..0..0....1..1..0....1..0..0....0..0..0....0..0..1
%e ..0..1..0....0..0..1....0..0..0....1..0..0....1..0..0....1..1..0....1..0..0
%K nonn
%O 1,1
%A _R. H. Hardin_ Nov 17 2012
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