A250158 - OEIS

%I #4 Nov 13 2014 21:22:59

%S 654,20513,240144,1611449,7601062,28153337,87461488,237724881,

%T 581746318,1307985393,2742532640,5423404233,10203578438,18390302857,

%U 31929395744,53644545313,87542977998,139200320065,216239016816,328916299865

%N Number of length 4+6 0..n arrays with every seven consecutive terms having the maximum of some two terms equal to the minimum of the remaining five terms

%C Row 4 of A250154

%H R. H. Hardin, <a href="/A250158/b250158.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = (5/21)*n^9 + (127/21)*n^8 + (251/7)*n^7 + (911/10)*n^6 + (684/5)*n^5 + (325/2)*n^4 + (3047/21)*n^3 + (6967/105)*n^2 + (946/105)*n + 1

%e Some solutions for n=2

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

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

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

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

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

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 13 2014