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Number of length 2+5 0..n arrays with every six consecutive terms having two times the sum of some two elements equal to the sum of the remaining four
1

%I #4 Oct 20 2014 18:43:03

%S 22,243,1944,8805,28366,84067,202628,429069,859390,1571551,2675332,

%T 4423193,6941954,10445275,15438956,22078997,30718938,42223499,

%U 56770760,74848061,97861362,125898023,159689464,201241105,250580166,308596907

%N Number of length 2+5 0..n arrays with every six consecutive terms having two times the sum of some two elements equal to the sum of the remaining four

%C Row 2 of A249085

%H R. H. Hardin, <a href="/A249087/b249087.txt">Table of n, a(n) for n = 1..70</a>

%e Some solutions for n=6

%e ..4....5....3....0....0....0....0....3....5....2....3....5....6....0....6....6

%e ..0....1....6....5....6....1....1....5....0....2....0....3....1....0....1....3

%e ..1....2....3....0....3....2....2....4....1....6....4....6....0....6....4....1

%e ..2....5....5....4....5....4....5....2....0....2....4....6....6....4....5....0

%e ..6....2....0....6....5....1....3....4....3....0....4....4....5....3....0....1

%e ..5....3....1....0....2....4....1....3....3....3....3....0....0....2....5....4

%e ..4....5....6....3....6....3....0....0....2....5....6....2....6....6....6....3

%K nonn

%O 1,1

%A _R. H. Hardin_, Oct 20 2014