%I #4 Nov 22 2014 19:27:52
%S 9,65,205,1351,5982,34415,169352,904695,4547008,23448029,117953499,
%T 598260521,3002881031,15113176921,75724031785,379750748041,
%U 1900758538693,9516621521809,47607635835257,238183334181909,1191212059701364
%N Number of length n+1 0..4 arrays with the sum of the minimum of each adjacent pair multiplied by some arrangement of +-1 equal to zero
%C Column 4 of A250419
%H R. H. Hardin, <a href="/A250415/b250415.txt">Table of n, a(n) for n = 1..91</a>
%e Some solutions for n=6
%e ..0....1....1....2....1....4....0....4....3....3....4....3....0....0....1....3
%e ..4....2....2....2....1....3....1....0....2....0....4....0....4....1....1....2
%e ..4....4....2....1....3....3....2....4....2....0....4....2....0....2....3....1
%e ..2....0....1....2....1....1....3....4....3....1....1....1....2....3....1....0
%e ..3....0....0....2....4....4....3....4....2....4....2....4....0....1....1....0
%e ..3....4....0....2....1....4....2....0....3....4....1....3....4....1....3....3
%e ..1....3....1....4....1....0....4....3....2....3....3....4....0....3....1....3
%K nonn
%O 1,1
%A _R. H. Hardin_, Nov 22 2014
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