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A250341 Number of length 5+5 0..n arrays with every six consecutive terms having the maximum of some three terms equal to the minimum of the remaining three terms 1

%I #4 Nov 19 2014 07:18:17

%S 272,9771,101264,596245,2506320,8403783,23943648,60312393,137935120,

%T 291832739,579084144,1088915165,1956006352,3377685375,5635747008,

%U 9123724305,14380518672,22131384091,33337351760,49254275877,71502779216

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

%C Row 5 of A250336

%H R. H. Hardin, <a href="/A250341/b250341.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = (1/105)*n^9 + (34/35)*n^8 + (25/2)*n^7 + 50*n^6 + 92*n^5 + (1384/15)*n^4 + (621/14)*n^3 - (173/21)*n^2 - (193/15)*n + 1

%e Some solutions for n=3

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

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

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

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

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

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 19 2014

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Last modified April 16 01:40 EDT 2024. Contains 371696 sequences. (Running on oeis4.)