cp's OEIS Frontend

A212469 Number of 0..3 arrays of length n+11 with sum no more than 18 in any length 12 subsequence (=50% duty cycle).

%I A212469 #6 Jun 02 2025 07:57:57
%S A212469 9240426,32644314,118029501,430682205,1578372444,5795798788,
%T A212469 21292987433,78186208521,286703599009,1049119428341,3828209603876,
%U A212469 13919545400124,50392127733527,182633247168566,663071942478215,2410713609407184
%N A212469 Number of 0..3 arrays of length n+11 with sum no more than 18 in any length 12 subsequence (=50% duty cycle).
%C A212469 Column 6 of A212471
%H A212469 R. H. Hardin, <a href="/A212469/b212469.txt">Table of n, a(n) for n = 1..37</a>
%e A212469 Some solutions for n=3
%e A212469 ..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0
%e A212469 ..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0
%e A212469 ..2....0....0....0....2....0....0....2....0....0....0....2....0....2....0....0
%e A212469 ..2....0....0....0....0....0....2....2....2....2....2....0....2....0....0....2
%e A212469 ..0....0....2....0....2....0....2....0....0....2....2....2....0....0....0....0
%e A212469 ..0....0....0....2....2....0....2....0....2....0....0....2....2....2....2....0
%e A212469 ..0....0....0....2....2....0....0....0....2....2....2....2....2....2....2....2
%e A212469 ..0....0....2....0....2....0....2....2....0....2....0....0....0....2....0....2
%e A212469 ..2....2....0....0....2....0....0....0....2....2....2....2....2....0....2....2
%e A212469 ..3....0....3....3....0....2....2....2....1....2....1....2....0....1....0....1
%e A212469 ..1....0....0....2....1....0....2....3....3....3....3....1....3....2....3....0
%e A212469 ..0....2....1....3....2....0....2....1....0....0....3....2....0....3....3....3
%e A212469 ..1....1....1....0....1....2....0....1....2....1....1....3....0....0....0....2
%e A212469 ..0....2....2....1....2....0....2....3....3....1....0....0....1....3....3....3
%K A212469 nonn
%O A212469 1,1
%A A212469 _R. H. Hardin_ May 17 2012