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%I #4 May 17 2012 14:31:11
%S 582440,2034200,7274268,26242268,95010466,344305566,1246724695,
%T 4504766041,16223101320,58162431112,207319630999,740101423056,
%U 2647902413670,9488805055639,34037887492235,122166508976307
%N Number of 0..3 arrays of length n+9 with sum no more than 15 in any length 10 subsequence (=50% duty cycle)
%C Column 5 of A212471
%H R. H. Hardin, <a href="/A212468/b212468.txt">Table of n, a(n) for n = 1..56</a>
%e Some solutions for n=3
%e ..2....0....0....2....2....2....0....0....2....2....0....2....0....2....0....2
%e ..0....0....2....0....0....2....2....0....0....0....0....2....0....0....0....0
%e ..0....0....0....2....0....2....2....0....0....0....2....0....0....0....0....2
%e ..0....0....0....0....0....2....0....0....0....2....2....2....2....0....2....2
%e ..0....2....0....2....2....0....0....0....0....2....2....0....0....2....0....0
%e ..0....2....0....0....2....2....2....0....0....0....0....0....2....0....0....0
%e ..0....0....2....0....2....2....2....2....0....2....0....0....2....0....2....0
%e ..2....0....2....3....2....0....0....0....3....1....3....1....1....0....3....3
%e ..3....3....2....2....1....1....2....2....3....0....0....3....2....3....0....1
%e ..2....3....2....1....3....1....2....2....1....2....3....0....1....0....1....3
%e ..2....3....3....2....1....1....0....2....3....1....0....1....2....2....1....0
%e ..2....2....1....1....0....3....3....0....1....1....1....3....3....3....1....2
%K nonn
%O 1,1
%A _R. H. Hardin_ May 17 2012
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