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A199843 Number of -4..4 arrays x(0..n-1) of n elements with zero sum and no element more than one greater than the previous 1
1, 5, 18, 68, 239, 845, 2958, 10349, 36111, 126121, 441161, 1546353, 5432430, 19130949, 67536934, 238991556, 847646318, 3012890719, 10730694626, 38289978058, 136865206035, 489995352710, 1756812943841, 6307268945198 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 4 of A199847

LINKS

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

EXAMPLE

Some solutions for n=6

..2....1....3....3....1....1....3....2....3...-1....3....4....0....2....2....3

..3....2....2....4...-1....2....2....3....0....0....1....3....0....2....0....4

..4....2....0...-1....0....2....2...-1....1....1....2....0....1....1....1...-1

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

.-4...-2...-3...-2....1...-2...-3...-2...-2...-1...-1...-1...-1...-3...-1...-2

.-3...-1...-3...-4...-2...-4...-4...-1...-4....0...-4...-4...-2...-4...-3...-1

CROSSREFS

Sequence in context: A158879 A322497 A279488 * A109438 A164051 A134764

Adjacent sequences:  A199840 A199841 A199842 * A199844 A199845 A199846

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 11 2011

STATUS

approved

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Last modified May 18 15:25 EDT 2021. Contains 343995 sequences. (Running on oeis4.)