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%I #4 May 06 2012 19:40:35
%S 353,4663,51440,514687,4931630,46305966,429886243,3962696059,
%T 36354382954,332393767866,3031533285381,27595759169532,
%U 250826014161861,2277103688384513,20652344756363304,187156724402029627
%N Number of 0..2 arrays of length 5+2*n with sum no more than 2*n in any length 2n subsequence (=50% duty cycle)
%C Row 6 of A212232
%H R. H. Hardin, <a href="/A212238/b212238.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=3
%e ..1....2....0....0....1....1....1....2....1....2....0....2....1....2....1....1
%e ..1....0....2....1....0....0....1....0....2....1....0....0....1....2....0....2
%e ..0....0....0....0....2....1....1....0....0....1....1....1....1....1....2....1
%e ..0....0....1....1....0....1....0....0....0....0....2....1....0....0....1....0
%e ..1....0....0....1....2....1....2....1....0....2....0....0....0....0....0....1
%e ..1....0....2....0....0....1....1....0....2....0....0....0....0....0....0....1
%e ..0....0....0....0....0....0....0....2....0....0....0....1....2....0....0....1
%e ..0....0....2....2....0....1....0....2....0....1....1....1....0....1....2....1
%e ..1....0....0....0....0....1....1....1....1....2....0....0....1....2....1....0
%e ..0....2....2....2....0....1....2....0....0....1....1....1....1....2....0....0
%e ..1....2....0....2....0....0....0....1....1....0....1....2....1....0....2....0
%K nonn
%O 1,1
%A _R. H. Hardin_ May 06 2012
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