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A200427 Number of -5..5 arrays x(0..n+2) of n+3 elements with zero sum and no two or three adjacent elements summing to zero 1

%I

%S 520,4750,36952,293464,2591502,23380862,210222830,1882624856,

%T 16911040968,152565274262,1381204433968,12534862082614,

%U 113983746333928,1038347313892636,9474508237939826,86579678278534962,792234931151418444

%N Number of -5..5 arrays x(0..n+2) of n+3 elements with zero sum and no two or three adjacent elements summing to zero

%C Column 5 of A200430

%H R. H. Hardin, <a href="/A200427/b200427.txt">Table of n, a(n) for n = 1..130</a>

%e Some solutions for n=3

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

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Nov 17 2011

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Last modified July 25 09:05 EDT 2021. Contains 346286 sequences. (Running on oeis4.)