A202007 Number of -n..n circular arrays x(0..4) of 5 elements with zero sums of x(i) and x(i)*x((i+1) mod 5)

11, 31, 61, 101, 111, 231, 261, 361, 431, 491, 541, 801, 851, 931, 1081, 1321, 1391, 1671, 1761, 1981, 2131, 2311, 2381, 2921, 3051, 3291, 3441, 3761, 3871, 4411, 4521, 4941, 5171, 5411, 5681, 6301, 6491, 6831, 7061, 7641, 7791, 8491, 8661, 9081, 9571

Offset

1,1

Comments

Row 3 of A202006

Links

R. H. Hardin, Table of n, a(n) for n = 1..182

Example

Some solutions for n=3
..0...-2....1...-2...-2....2...-2....2....0....1....3....0...-2....0...-1...-2
.-1....0....0....2...-1....1....3...-3....3....2...-2...-3....0....2....0....2
.-2....0....0....1...-2....2....2...-2....0...-2...-1....0....2....0....1....1
..2....2...-1....2....2...-2...-2....2....0...-3...-2....0....0....0....2....0
..1....0....0...-3....3...-3...-1....1...-3....2....2....3....0...-2...-2...-1

Crossrefs

Sequence in context: A196117 A040162 A113747 * A125239 A062786 A090562

Adjacent sequences: A202004 A202005 A202006 * A202008 A202009 A202010

Keyword

nonn

Author

R. H. Hardin Dec 07 2011

Status

approved