A199827 - OEIS

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A199827

Number of -3..3 arrays x(0..n+1) of n+2 elements with zero sum and no two neighbors summing to zero

24, 140, 646, 3556, 20240, 113884, 645780, 3685550, 21117750, 121503530, 701432670, 4060132070, 23557575574, 136975281374, 797920002262, 4655761528566, 27205829211568, 159187551327960, 932560727269722

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

OFFSET

1,1

COMMENTS

Column 3 of A199832

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

EXAMPLE

Some solutions for n=3

.-1...-2....3...-3....0....0...-3....2....1....0....1....2...-1....1....3....0

.-1...-3...-2...-2....2....1....1....3...-2....1....2...-1....2....3....0....1

..3....0....1....3...-1...-3....3....1....0...-2...-1....2....1....1...-1....0