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A202956 Number of arrays of n+2 integers in -2..2 with sum zero and adjacent elements differing in absolute value 1
6, 28, 82, 200, 524, 1724, 5908, 18340, 53680, 162080, 515626, 1651124, 5168256, 15997588, 50018962, 158377344, 502147864, 1584312736, 4991421852, 15779264936, 50053153920, 158866891408, 503893624892, 1598691706648, 5078888702164 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A202962

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

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

CROSSREFS

Sequence in context: A326484 A144945 A308585 * A279915 A300906 A222198

Adjacent sequences:  A202953 A202954 A202955 * A202957 A202958 A202959

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 26 2011

STATUS

approved

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Last modified October 27 12:08 EDT 2021. Contains 348276 sequences. (Running on oeis4.)