

A202009


Number of n..n circular arrays x(0..6) of 7 elements with zero sums of x(i) and x(i)*x((i+1) mod 7)


1



85, 799, 2605, 7463, 14365, 33699, 53775, 90007, 136473, 213767, 289059, 433343, 552315, 763309, 989675, 1281575, 1548177, 2060815, 2445591, 3041291, 3622123, 4429993, 5095021, 6220341, 7131545, 8453999, 9715693, 11291939, 12624487
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OFFSET

1,1


COMMENTS

Row 5 of A202006


LINKS

R. H. Hardin, Table of n, a(n) for n = 1..38


EXAMPLE

Some solutions for n=2
.2....2....2...2....0....0....2....2...1....0...1....0...2...1...2...1
.2....0...1....2...2....0....0....0....1....2....1....0....1....0....2....1
.1...2...2...1....2....0....0...1....1....0....1...2...2....0....1....1
..2....0...1....2....1....1...2...2....2....1....0....2....1....2....2....0
..2....0....2....2....2....0....0....1...2...2....0....2....2....0...1...1
.1....0....0...1...1....0...2....0...1...2...1....0....2....1...2....0
..2....0....0...2...2...1....2....0....0....1....0...2...2...2....0....0


CROSSREFS

Sequence in context: A020212 A183777 A173470 * A194533 A069308 A183643
Adjacent sequences: A202006 A202007 A202008 * A202010 A202011 A202012


KEYWORD

nonn


AUTHOR

R. H. Hardin Dec 07 2011


STATUS

approved



