%I #5 Mar 31 2012 12:36:39
%S 4,10,26,69,181,455,1120,2794,6955,17254,42770,105825,262026,648672,
%T 1605786,3974375,9835789,24343416,60250311,149117782,369056036,
%U 913396093,2260628044,5594995167,13847440350,34272006253,84822308047,209933077581
%N Number of 0..3 arrays x(0..n-1) of n elements with each no smaller than the sum of its four previous neighbors modulo 4
%C Column 3 of A200469
%H R. H. Hardin, <a href="/A200464/b200464.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=6
%e ..2....0....1....2....0....0....1....0....0....0....0....2....3....2....2....0
%e ..3....0....3....2....0....0....3....3....1....0....2....2....3....3....2....1
%e ..1....2....2....1....3....1....0....3....3....1....2....0....2....3....2....3
%e ..3....2....2....3....3....3....0....2....1....3....0....3....1....2....2....0
%e ..1....1....2....1....2....1....2....0....3....3....0....3....1....2....3....1
%e ..2....3....2....3....3....3....2....1....3....3....2....1....3....2....3....3
%K nonn
%O 1,1
%A _R. H. Hardin_ Nov 18 2011
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