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Number of length n+1 0..7 arrays with the sum of adjacent differences multiplied by some arrangement of +-1 equal to zero
1

%I #4 Nov 13 2014 21:35:00

%S 8,88,976,10460,103556,938128,7989940,65768448,532548628,4281269376,

%T 34316191340,274736779444,2198552029712,17590557578440,

%U 140731669092632,1125878500233800,9007118671839640,72057285402401144,576459555378977560

%N Number of length n+1 0..7 arrays with the sum of adjacent differences multiplied by some arrangement of +-1 equal to zero

%C Column 7 of A250167

%H R. H. Hardin, <a href="/A250166/b250166.txt">Table of n, a(n) for n = 1..22</a>

%e Some solutions for n=5

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

%e ..1....5....0....6....3....6....7....7....5....2....2....7....4....4....3....6

%e ..5....7....3....3....1....5....3....3....3....2....1....2....6....5....5....7

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

%e ..5....7....7....3....2....3....6....5....4....0....7....7....3....4....5....1

%e ..2....7....7....2....1....1....5....4....0....0....7....5....5....2....6....0

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 13 2014