A202074 Number of arrays of n+2 integers in -6..6 with sum zero and the sum of every adjacent pair being odd

30, 364, 1128, 0, 35604, 462436, 1516410, 0, 50331332, 670671976, 2244207954, 0, 76189204224, 1028085663460, 3477020782410, 0, 119558435601108, 1625407357115064, 5533419347709582, 0, 191835254536494250

Offset

1,1

Comments

Column 6 of A202076

Links

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

Example

Some solutions for n=3
..2....6....4...-6...-4....2....2...-4...-6...-4....4....0...-2...-4...-2....4
..1...-1...-3...-1....3....1...-1...-1....1....5...-1...-5....3....1....3...-5
.-6....2....2....0...-2...-4...-4....2....6...-4...-2....0...-6...-2....0...-4
.-3...-5....3....3...-1...-3....5...-3...-5....1....3....3....3...-1....5....3
..6...-2...-6....4....4....4...-2....6....4....2...-4....2....2....6...-6....2

Crossrefs

Sequence in context: A138441 A058837 A042748 * A251895 A022690 A224332

Adjacent sequences: A202071 A202072 A202073 * A202075 A202076 A202077

Keyword

nonn

Author

R. H. Hardin Dec 10 2011

Status

approved