A201435 - OEIS

A201435

Number of zero-sum -4..4 arrays of n elements with first through fourth differences also in -4..4

1, 5, 21, 75, 111, 527, 1275, 3643, 10245, 30215, 82859, 239133, 688547, 1986411, 5743067, 16751055, 48750751, 142319063, 416145857, 1218638091, 3571823395, 10485601869, 30812312143, 90634015523, 266849118935, 786358091871

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OFFSET

1,2

COMMENTS

Column 4 of A201439

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..162

EXAMPLE

Some solutions for n=10

.-3....3...-1....2....2....1...-3....2...-4....1...-1...-4....3....4...-3...-2

.-4....3....0....3....0...-2...-1....0....0....0....0...-4...-1....1....1....2

.-2....1...-1....3...-2...-2...-2...-2....2....0....0...-3...-2...-1....2....2

..0...-2...-1....1...-2...-1...-3...-2....1...-1...-1...-1...-2...-3....0...-1

..2...-3....1...-1...-2....1...-2....0...-2...-1....0....1...-1...-2...-2...-4

..3...-3....2...-2....0....1....1....2...-3...-1....2....3...-1....1...-2...-4

..2...-2....2...-1....2....0....3....2...-2....0....2....3...-1....2....0...-2

..0...-1....0...-1....2....0....3....1....1....1....0....3....0....0....2....1

..0....1...-2...-1....1....0....3....0....4....1...-1....2....1...-2....2....4

..2....3....0...-3...-1....2....1...-3....3....0...-1....0....4....0....0....4

CROSSREFS

Sequence in context: A273450 A186948 A271251 * A202507 A079923 A272452

Adjacent sequences: A201432 A201433 A201434 * A201436 A201437 A201438

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 01 2011

STATUS

approved