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A200159 Number of -2..2 arrays x(0..n-1) of n elements with nonzero sum and with zero through n-1 differences all nonzero.

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%I A200159 #7 Jul 22 2025 15:42:25
%S A200159 4,8,34,76,276,700,2276,5992,18542,50488,151814,420680,1241580,
%T A200159 3481308,10162686,28707288,83211126,236138900,681383716,1939299184,
%U A200159 5579324890,15908310224,45678520824,130391096068
%N A200159 Number of -2..2 arrays x(0..n-1) of n elements with nonzero sum and with zero through n-1 differences all nonzero.
%C A200159 Column 2 of A200165
%e A200159 Some solutions for n=5
%e A200159 ..2...-2...-1...-2....2...-1....1...-2...-2....1....2....1...-1....2...-1...-2
%e A200159 .-1...-1...-2....1....1....1....2....2....1...-1...-2...-1....2....1....1....1
%e A200159 .-2....2...-1...-1....2....2...-2...-1....2....1....2....1...-1...-2...-2...-1
%e A200159 ..1...-2....1...-2...-1...-1....2...-2...-1...-2...-1...-1....1....2...-1...-2
%e A200159 .-1....1....2...-1...-2....2...-2....2....2...-1....1....1....2....1...-2....2
%K A200159 nonn
%O A200159 1,1
%A A200159 _R. H. Hardin_ Nov 13 2011

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