A202075 Number of arrays of n+2 integers in -7..7 with sum zero and the sum of every adjacent pair being odd

44, 560, 1786, 0, 95342, 1264272, 4213042, 0, 241384794, 3259289000, 11028760078, 0, 651843679214, 8881641917904, 30295985735960, 0, 1822122857478000, 24962501190898560, 85571276146432860, 0, 5204404120691796724

Offset

1,1

Comments

Column 7 of A202076

Links

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

Example

Some solutions for n=3
.-4....4....4....2...-6....2....4...-6...-4...-2....2....0....0...-2...-2....2
.-5...-5....7...-5....5...-1...-5....7...-3....7...-3...-3....5....3....3...-7
.-2....2...-4....2....0....0...-2...-2....6...-2....6...-2...-2....4...-2....6
..5...-3...-7...-5...-5...-3....7....1....1...-1...-1....5...-3...-7....1...-7
..6....2....0....6....6....2...-4....0....0...-2...-4....0....0....2....0....6

Crossrefs

Sequence in context: A283541 A354608 A339852 * A297680 A264680 A356415

Adjacent sequences: A202072 A202073 A202074 * A202076 A202077 A202078

Keyword

nonn

Author

R. H. Hardin Dec 10 2011

Status

approved