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Number of length 4+6 0..n arrays with no seven consecutive terms having the maximum of any three terms equal to the minimum of the remaining four terms
1

%I #4 Nov 07 2014 21:16:34

%S 35,4019,118638,1599494,12991337,74439217,331379292,1219778604,

%T 3872511183,10923962159,27981170954,66148387890,146141454485,

%U 304712555117,604328255416,1147307969496,2095939712763,3700448828331

%N Number of length 4+6 0..n arrays with no seven consecutive terms having the maximum of any three terms equal to the minimum of the remaining four terms

%C Row 4 of A249883

%H R. H. Hardin, <a href="/A249887/b249887.txt">Table of n, a(n) for n = 1..52</a>

%F Empirical: a(n) = n^10 + (37/105)*n^9 + (363/70)*n^8 + (442/105)*n^7 + (917/90)*n^6 + (211/30)*n^5 + (149/90)*n^4 + (407/70)*n^3 - (167/315)*n^2 + (19/210)*n

%e Some solutions for n=3

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

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

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

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

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

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 07 2014