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A250329 Number of length n+5 0..1 arrays with every six consecutive terms having the maximum of some three terms equal to the minimum of the remaining three terms. 1

%I

%S 44,68,108,172,272,424,648,996,1544,2404,3746,5830,9048,14024,21746,

%T 33754,52426,81432,126454,196308,304706,472986,734300,1140068,1770064,

%U 2748096,4266370,6623360,10282584,15963684,24783794,38477102,59735816

%N Number of length n+5 0..1 arrays with every six consecutive terms having the maximum of some three terms equal to the minimum of the remaining three terms.

%H R. H. Hardin, <a href="/A250329/b250329.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = a(n-1) + a(n-3) + 2*a(n-6) - 2*a(n-9) - a(n-10) - a(n-12) + a(n-15).

%F Empirical g.f.: 2*x*(22 + 12*x + 20*x^2 + 10*x^3 + 16*x^4 + 22*x^5 - 18*x^6 - 30*x^7 - 46*x^8 - 22*x^9 - 9*x^10 - 12*x^11 + 7*x^12 + 11*x^13 + 16*x^14) / ((1 - x)*(1 + x + x^2)*(1 - x - x^4 - 2*x^6 - x^7 + x^12)). - _Colin Barker_, Nov 12 2018

%e Some solutions for n=6:

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

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

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

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

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

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

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

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

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

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

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

%Y Column 1 of A250336.

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 19 2014

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Last modified June 18 07:25 EDT 2021. Contains 345098 sequences. (Running on oeis4.)