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A213471 Number of 0..3 arrays of length 2*n+6 with sum less than 3*n in any length 2n subsequence (=less than 50% duty cycle) 1

%I

%S 793,65425,1940673,43399990,836356119,15103463125,263422708979,

%T 4498700185621,75773483221458,1264058518607488,20939915070874170,

%U 345057032966423355,5662807472785412683,92633089841621699568

%N Number of 0..3 arrays of length 2*n+6 with sum less than 3*n in any length 2n subsequence (=less than 50% duty cycle)

%C Row 7 of A213464

%H R. H. Hardin, <a href="/A213471/b213471.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=3

%e ..0....0....2....2....2....0....0....0....0....0....2....2....0....0....2....0

%e ..0....0....0....0....2....2....0....0....2....0....0....2....2....0....0....0

%e ..0....2....0....2....0....2....0....0....0....2....0....2....2....0....2....2

%e ..0....2....0....2....0....2....0....2....2....0....2....2....0....2....0....0

%e ..2....0....2....0....2....0....2....2....0....0....2....0....0....0....0....0

%e ..3....1....1....0....0....1....0....0....1....2....0....0....0....1....0....0

%e ..2....0....0....0....3....0....3....0....0....2....2....2....0....1....1....2

%e ..0....0....0....3....0....1....3....1....2....0....0....1....2....1....0....2

%e ..0....0....0....0....1....0....0....0....1....2....0....2....0....1....1....0

%e ..0....1....2....2....1....3....0....0....0....0....2....0....3....2....2....0

%e ..0....1....1....1....0....2....2....2....2....0....2....3....2....0....3....1

%e ..1....1....0....2....3....0....0....1....1....3....0....0....0....3....0....0

%K nonn

%O 1,1

%A _R. H. Hardin_ Jun 12 2012

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Last modified May 25 10:05 EDT 2022. Contains 354066 sequences. (Running on oeis4.)