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%I #4 May 06 2012 19:31:43
%S 302615,808403,2204646,6062948,16740414,46305966,128148456,354470546,
%T 979272751,2700150083,7425872754,20355794336,55576133157,151888056136,
%U 415782103202,1139624300299,3126418458642,8581964181953,23565242287322
%N Number of 0..2 arrays of length n+11 with sum no more than 12 in any length 12 subsequence (=50% duty cycle)
%C Column 6 of A212232
%H R. H. Hardin, <a href="/A212230/b212230.txt">Table of n, a(n) for n = 1..122</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 ..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0
%e ..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0
%e ..1....1....1....2....0....1....0....0....0....0....0....1....1....0....0....1
%e ..1....1....1....0....0....0....2....1....2....1....0....2....0....1....1....0
%e ..0....2....1....0....1....1....2....1....1....0....2....1....0....1....0....1
%e ..2....0....2....2....0....1....0....0....1....1....0....0....1....2....2....1
%e ..2....1....1....1....2....1....1....2....0....0....1....1....1....2....1....2
%e ..1....2....0....2....2....2....0....2....0....1....2....0....0....0....1....0
%e ..0....0....0....1....1....0....0....0....0....2....0....1....0....2....1....1
%e ..1....1....2....2....1....0....1....1....1....2....1....0....0....1....0....2
%e ..1....1....1....0....2....1....0....2....2....1....0....0....2....1....0....2
%e ..1....2....2....0....0....2....1....0....0....0....0....2....1....0....1....1
%e ..0....1....0....2....1....2....0....1....0....1....0....2....0....1....2....1
%K nonn
%O 1,1
%A _R. H. Hardin_ May 06 2012