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A200548 Number of -3..3 arrays x(0..n+1) of n+2 elements with zero sum and nonzero second differences 1
30, 200, 1184, 7254, 43698, 266812, 1639804, 10152636, 63132188, 394016210, 2466471522, 15481097890, 97396742734, 614019893832, 3878005568152, 24532092598782, 155413031752230, 985836563404470, 6260856742508844 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A200553

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

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

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

CROSSREFS

Sequence in context: A125340 A126498 A029545 * A165030 A165016 A209796

Adjacent sequences:  A200545 A200546 A200547 * A200549 A200550 A200551

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 19 2011

STATUS

approved

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Last modified September 18 21:53 EDT 2020. Contains 337173 sequences. (Running on oeis4.)