

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)


1



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
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OFFSET

1,1


COMMENTS



LINKS



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



KEYWORD

nonn


AUTHOR



STATUS

approved



