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A200461 Number of -n..n arrays x(0..8) of 9 elements with zero sum and nonzero first and second differences 1
34, 18692, 548204, 5876818, 36725772, 163058296, 572857272, 1697721154, 4418429664, 10383073842, 22471124198, 45437973772, 86792210440, 157952348940, 275717978586, 464147942094, 756885155284, 1199972729134, 1855294240358 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 7 of A200454

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..39

EXAMPLE

Some solutions for n=3

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

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

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

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

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

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

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

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

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

CROSSREFS

Sequence in context: A220870 A281539 A223040 * A287052 A177324 A270874

Adjacent sequences:  A200458 A200459 A200460 * A200462 A200463 A200464

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 18 2011

STATUS

approved

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Last modified October 20 19:28 EDT 2020. Contains 337909 sequences. (Running on oeis4.)