A202010 Number of -n..n circular arrays x(0..7) of 8 elements with zero sums of x(i) and x(i)*x((i+1) mod 8)

329, 4281, 22865, 80065, 221433, 511257, 1039409, 1942577, 3390393, 5593849, 8817137, 13364177, 19646313, 28112089, 39223825, 53614481, 71956841, 95063497, 123687521, 158858737, 201582329, 252854953, 314267937, 386939601, 472760313

Offset

1,1

Comments

Row 6 of A202006

Links

R. H. Hardin, Table of n, a(n) for n = 1..30

Example

Some solutions for n=1
..1....0....1....0....1....1...-1....1....1....1....0....0....1....0....0....0
..1....1....1....1....0....1....0...-1....0....0....1....0....0....0....0...-1
..0....1....0....0...-1...-1....0...-1....1....0....0....1...-1...-1...-1....0
..0...-1....1....0...-1...-1....0....0...-1....0...-1...-1....0....0....1....1
..0....1...-1....0....1....0....1....1....0...-1....0...-1....0....0....1....0
.-1....0....0...-1....1....1....1....0...-1....0....0....0....0....0....0....1
..0...-1...-1....0...-1...-1...-1....0...-1....0....0....1....0....0....0....0
.-1...-1...-1....0....0....0....0....0....1....0....0....0....0....1...-1...-1

Crossrefs

Sequence in context: A253054 A273615 A231362 * A265195 A190920 A145274

Adjacent sequences: A202007 A202008 A202009 * A202011 A202012 A202013

Keyword

nonn

Author

R. H. Hardin Dec 07 2011

Status

approved