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%I #6 May 12 2023 15:32:13
%S 1,2,3,4,5,8,13,20,29,45,73,118,185,294,480,793,1298,2127,3531,5932,
%T 9975,16783,28415,48527,83236,143064,246839,428430,747193,1307145,
%U 2294023,4043525,7158170,12715501,22656789,40512977,72713331,130948115,236535554
%N Number of nonnegative integer arrays of length n+2*4-2 with new values introduced in order 0 upwards and every value appearing only in runs of at least 4.
%C Column 4 of A211700.
%H R. H. Hardin, <a href="/A211696/b211696.txt">Table of n, a(n) for n = 1..210</a>
%e All solutions for n=5
%e ..0....0....0....0....0
%e ..0....0....0....0....0
%e ..0....0....0....0....0
%e ..0....0....0....0....0
%e ..0....0....0....0....1
%e ..1....0....0....0....1
%e ..1....0....1....0....1
%e ..1....1....1....0....1
%e ..1....1....1....0....1
%e ..1....1....1....0....1
%e ..1....1....1....0....1
%Y Cf. A211700.
%K nonn
%O 1,2
%A _R. H. Hardin_, Apr 19 2012