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A200460 Number of -n..n arrays x(0..7) of 8 elements with zero sum and nonzero first and second differences 1
22, 5478, 103726, 820650, 4062384, 14923636, 44716536, 115516220, 266427776, 562116652, 1103746930, 2042412926, 3596047852, 6069519806, 9877920686, 15574753386, 23883962076, 35735712652, 52308828350, 75077488038 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 6 of A200454

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

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

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

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

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

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

CROSSREFS

Sequence in context: A218719 A109776 A110802 * A202054 A279298 A235389

Adjacent sequences:  A200457 A200458 A200459 * A200461 A200462 A200463

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 18 2011

STATUS

approved

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Last modified September 16 21:28 EDT 2021. Contains 347473 sequences. (Running on oeis4.)