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A199829 Number of -5..5 arrays x(0..n+1) of n+2 elements with zero sum and no two neighbors summing to zero 1

%I #5 Mar 31 2012 12:36:37

%S 70,660,5390,49302,462234,4340094,41008804,389832124,3723199342,

%T 35697026718,343371074564,3312138136660,32026131818486,

%U 310327172410762,3012628449222084,29294846427926718,285286085845772334

%N Number of -5..5 arrays x(0..n+1) of n+2 elements with zero sum and no two neighbors summing to zero

%C Column 5 of A199832

%H R. H. Hardin, <a href="/A199829/b199829.txt">Table of n, a(n) for n = 1..200</a>

%e Some solutions for n=3

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Nov 11 2011

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Last modified April 25 11:39 EDT 2024. Contains 371969 sequences. (Running on oeis4.)