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A202001 Number of -3..3 circular arrays x(0..n+1) of n+2 elements with zero sums of x(i) and x(i)*x((i+1) mod (n+2)) 1
1, 49, 61, 601, 2605, 22865, 101395, 657871, 3603821, 25726609, 150646627, 1027976993, 6463089721, 43715824593, 278513680357, 1863303355141, 12132105992613, 81455933000439, 537677650826359, 3614341859258835 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 3 of A202006

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..74

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

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

CROSSREFS

Sequence in context: A111327 A184033 A178951 * A038640 A326151 A216165

Adjacent sequences:  A201998 A201999 A202000 * A202002 A202003 A202004

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 07 2011

STATUS

approved

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Last modified May 16 22:37 EDT 2022. Contains 353724 sequences. (Running on oeis4.)