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A183943
Number of strings of n numbers x(i) in -8..8 with sums of x(i) and of x(i)*x(i+1) both zero
0
1, 1, 17, 69, 1417, 9335, 135793, 1639099, 23586625, 323498939, 4919390397, 73971159473, 1157160667507
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OFFSET
1,3
COMMENTS
Column 8 of A183944
LINKS
Table of n, a(n) for n=1..13.
EXAMPLE
Some solutions for n=4
..3....6....3...-4....7...-2...-3...-8....0...-4....8....2....5...-2....0....0
..0....0....6....0....0....0....0....2....7....1....0....0....0...-4....8...-3
..0...-6...-6....0...-7....2....3....4....0....2...-8....0...-5...-2....0....0
.-3....0...-3....4....0....0....0....2...-7....1....0...-2....0....8...-8....3
CROSSREFS
Sequence in context: A041556 A041558 A327495 * A180532 A179038 A179039
Adjacent sequences: A183940 A183941 A183942 * A183944 A183945 A183946
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 08 2011
STATUS
approved

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Last modified November 7 11:16 EST 2024. Contains 377535 sequences.
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