A202128 - OEIS

A202128

Number of -n..n arrays of 7 elements with first, second and third differences also in -n..n

47, 1517, 15101, 85771, 345241, 1104357, 2993875, 7169025, 15586785, 31358615, 59213403, 106061265, 181644529, 299379215, 477297063, 739082975, 1115418273, 1645395261, 2378011923, 3374165639, 4708618657, 6472020879, 8773706563

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OFFSET

1,1

COMMENTS

Row 7 of A202124

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..172

EXAMPLE

Some solutions for n=5

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

.-4...-5...-1...-3...-4...-2...-4...-5...-4...-3...-4...-2...-1...-3...-2...-1

.-2...-5....1...-3...-5...-2...-4...-5...-1...-4...-5...-5....0...-1...-3....2

.-1...-3....0...-3...-5...-1...-4...-3....3...-5...-2...-5....0....0...-3....4

.-3....1...-1...-1...-3....0...-4...-2....5...-4....1...-5....2....1...-4....5

.-3....2...-1...-2....0...-3...-4...-1....5...-1....1...-2....5...-1...-3....2

.-3....0....2...-2...-1...-5...-1....2....4....1....3....1....5...-3....0...-2

CROSSREFS

Sequence in context: A157359 A153214 A142845 * A278268 A014941 A280707

Adjacent sequences: A202125 A202126 A202127 * A202129 A202130 A202131

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 11 2011

STATUS

approved