A202071 Number of arrays of n+2 integers in -3..3 with sum zero and the sum of every adjacent pair being odd

10, 56, 78, 0, 1014, 5832, 8412, 0, 118560, 691352, 1009378, 0, 14741482, 86567880, 127201108, 0, 1895190810, 11176778256, 16487950878, 0, 248820363000, 1471592159928, 2176717161564, 0, 33142566417012, 196414950943848

Offset

1,1

Comments

Column 3 of A202076

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A244303 A261848 A000814 * A281207 A228888 A137931

Adjacent sequences: A202068 A202069 A202070 * A202072 A202073 A202074

Keyword

nonn

Author

R. H. Hardin Dec 10 2011

Status

approved