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%I #5 Mar 31 2012 12:36:25
%S 3,23,123,809,5274,33923,219807,1424725,9226721,59782080,387322045,
%T 2509377827,16258011561,105333834791,682445646554,4421489543317,
%U 28646335313891,185596395723437,1202458284920023,7790592650792034
%N Number of nX2 0..4 arrays with each element equal to the number its horizontal and vertical neighbors less than itself
%C Column 2 of A196430
%H R. H. Hardin, <a href="/A196424/b196424.txt">Table of n, a(n) for n = 1..200</a>
%F Empirical: a(n) = 3*a(n-1) +22*a(n-2) +24*a(n-3) -86*a(n-4) -296*a(n-5) -126*a(n-6) +428*a(n-7) +420*a(n-8) +239*a(n-9) +92*a(n-10) -147*a(n-11) +22*a(n-12) +26*a(n-13) -13*a(n-14) +5*a(n-15)
%e Some solutions for n=3
%e ..2..0....0..0....0..0....0..0....2..0....2..0....1..2....0..2....2..0....1..0
%e ..0..0....2..3....3..2....0..0....1..1....1..3....0..0....3..0....1..3....2..2
%e ..0..0....0..1....0..1....1..2....0..2....0..1....2..1....1..0....0..0....0..0
%K nonn
%O 1,1
%A _R. H. Hardin_ Oct 02 2011
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