A200159 - OEIS

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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

4, 8, 34, 76, 276, 700, 2276, 5992, 18542, 50488, 151814, 420680, 1241580, 3481308, 10162686, 28707288, 83211126, 236138900, 681383716, 1939299184, 5579324890, 15908310224, 45678520824, 130391096068

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 2 of A200165

LINKS

Table of n, a(n) for n=1..24.

EXAMPLE

Some solutions for n=5

..2...-2...-1...-2....2...-1....1...-2...-2....1....2....1...-1....2...-1...-2

.-1...-1...-2....1....1....1....2....2....1...-1...-2...-1....2....1....1....1

.-2....2...-1...-1....2....2...-2...-1....2....1....2....1...-1...-2...-2...-1