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A200189 Number of -5..5 arrays x(0..n-1) of n elements with zero sum, adjacent elements differing by more than one, and elements alternately increasing and decreasing 1

%I #5 Mar 31 2012 12:36:38

%S 1,10,44,242,1298,7266,40632,231916,1320876,7630236,43951298,

%T 255926506,1485664226,8700154180,50792100530,298703878402,

%U 1751415860436,10333766393384,60797757383394,359661008763242,2121869963574120

%N Number of -5..5 arrays x(0..n-1) of n elements with zero sum, adjacent elements differing by more than one, and elements alternately increasing and decreasing

%C Column 5 of A200192

%H R. H. Hardin, <a href="/A200189/b200189.txt">Table of n, a(n) for n = 1..200</a>

%e Some solutions for n=5

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

%e ..2....5...-4....4...-4....3....2...-5....5....4...-4....4....5....4....5....5

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Nov 14 2011

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