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A202123 Number of -7..7 arrays of n elements with first, second and third differences also in -7..7 1
15, 169, 1483, 9739, 65773, 443169, 2993875, 20229855, 136692527, 923636217, 6241166303, 42172597643, 284966475203, 1925560567969, 13011302413343, 87919326690553, 594084073349817, 4014315174232981, 27125329889094427 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A202124

LINKS

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

EXAMPLE

Some solutions for n=5

..1....0...-2....7....6....0....0...-3....1...-4...-2....6...-6....2...-4....2

..5....0....1....5...-1....7....1...-2....4...-2....0....3...-2....3...-2...-5

..7...-2....0....0...-4....7....5....0....3....2....4...-3....0....5...-3...-7

..7...-1....1...-5...-2....4....5...-1....3....2....5...-7....0....5...-2...-6

..0...-1....7...-6....0....2....6...-7...-3....4....3...-4....2....0...-3...-2

CROSSREFS

Sequence in context: A121116 A218928 A202663 * A201087 A138973 A016177

Adjacent sequences:  A202120 A202121 A202122 * A202124 A202125 A202126

KEYWORD

nonn

AUTHOR

R. H. Hardin Dec 11 2011

STATUS

approved

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Last modified July 4 11:02 EDT 2022. Contains 355075 sequences. (Running on oeis4.)