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A202958 Number of arrays of n+2 integers in -4..4 with sum zero and adjacent elements differing in absolute value 1
36, 268, 1562, 9884, 66208, 447528, 3020170, 20430512, 139027620, 950710524, 6520317018, 44823140280, 308853569150, 2132736199028, 14754220477302, 102231808797944, 709381651755672, 4928801328948764, 34285920139143690 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A202962

LINKS

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

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

CROSSREFS

Sequence in context: A115223 A135181 A220159 * A187511 A185243 A014136

Adjacent sequences:  A202955 A202956 A202957 * A202959 A202960 A202961

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 26 2011

STATUS

approved

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Last modified June 16 13:05 EDT 2021. Contains 345057 sequences. (Running on oeis4.)