A200159 - OEIS

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

%S 4,8,34,76,276,700,2276,5992,18542,50488,151814,420680,1241580,

%T 3481308,10162686,28707288,83211126,236138900,681383716,1939299184,

%U 5579324890,15908310224,45678520824,130391096068

%N 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 Column 2 of A200165

%e Some solutions for n=5

%e ..2...-2...-1...-2....2...-1....1...-2...-2....1....2....1...-1....2...-1...-2

%e .-1...-1...-2....1....1....1....2....2....1...-1...-2...-1....2....1....1....1

%e .-2....2...-1...-1....2....2...-2...-1....2....1....2....1...-1...-2...-2...-1

%e ..1...-2....1...-2...-1...-1....2...-2...-1...-2...-1...-1....1....2...-1...-2

%e .-1....1....2...-1...-2....2...-2....2....2...-1....1....1....2....1...-2....2

%K nonn

%O 1,1

%A _R. H. Hardin_ Nov 13 2011