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%I #4 Apr 21 2012 19:05:58
%S 1,16,157,1254,9068,62617,426022,2913894,20307833,145503003,
%T 1077731960,8277491943,66003259942,546398875027,4692545543444,
%U 41760563809046,384605668021029,3660788725969481,35964832246977675,364242679197958081
%N Number of nonnegative integer arrays of length n+4 with new values 0 upwards introduced in order, no three adjacent elements equal, and containing the value 4
%C Column 3 of A211836
%H R. H. Hardin, <a href="/A211831/b211831.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=3
%e ..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0
%e ..1....1....1....1....1....1....1....1....1....1....1....1....1....1....1....1
%e ..2....0....0....2....2....2....1....2....2....0....2....2....2....2....2....0
%e ..3....1....2....0....3....2....2....3....3....2....3....3....0....2....3....2
%e ..1....2....2....3....2....3....3....1....4....3....1....0....2....3....4....3
%e ..4....3....3....4....0....0....1....3....5....4....2....3....3....4....5....4
%e ..3....4....4....2....4....4....4....4....4....3....4....4....4....4....3....2
%K nonn
%O 1,2
%A _R. H. Hardin_ Apr 21 2012
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