A202073 Number of arrays of n+2 integers in -5..5 with sum zero and the sum of every adjacent pair being odd.

24, 220, 504, 0, 15010, 142692, 340660, 0, 10924220, 105606040, 255768620, 0, 8472842700, 82602700388, 201570991218, 0, 6800283132780, 66634056364880, 163360889824230, 0, 5575911122723700, 54822111009651480, 134826580792851780

Offset: 1

Author

R. H. Hardin, Dec 10 2011

Keywords

• nonn

Comments

Column 5 of A202076.

Examples

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

Links

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

Crossrefs

Cf. A202076.