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A202073
Number of arrays of n+2 integers in -5..5 with sum zero and the sum of every adjacent pair being odd.
1
24, 220, 504, 0, 15010, 142692, 340660, 0, 10924220, 105606040, 255768620, 0, 8472842700, 82602700388, 201570991218, 0, 6800283132780, 66634056364880, 163360889824230, 0, 5575911122723700, 54822111009651480, 134826580792851780
OFFSET
1,1
COMMENTS
Column 5 of A202076.
LINKS
EXAMPLE
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
CROSSREFS
Cf. A202076.
Sequence in context: A138406 A042112 A297679 * A107968 A269777 A024302
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 10 2011
STATUS
approved