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A228263 Number of third differences of arrays of length 7 of numbers in 0..n. 1
127, 2059, 13933, 53315, 141989, 310425, 596591, 1045439, 1707409, 2640285, 3910211, 5589739, 7758477, 10503089, 13917295, 18101871, 23164649, 29220517, 36391419, 44806355, 54601381, 65919609, 78911207, 93733399, 110550465 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Row 4 of A228260
LINKS
FORMULA
Empirical: a(n) = 294*n^4 - 256*n^3 - 489*n^2 + 477*n + 415 for n>8
EXAMPLE
Some solutions for n=4
..6....3...-1....7....5....4....3...-1...15...-5...13....9...-2...10....0...14
.-9...-5....0..-13...-8...-4...-6...-1..-16....3...-4...-4...-4..-15....0..-12
..7....4....4...11....0....0....8....0...16...-1...-2....2....4...13....1...10
..0....2...-4...-7....7....2...-9....0..-16....6...-4...-1...-3...-3...-3..-11
CROSSREFS
Sequence in context: A258005 A258015 A181126 * A228222 A022523 A090029
KEYWORD
nonn
AUTHOR
R. H. Hardin Aug 19 2013
STATUS
approved

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Last modified April 21 08:26 EDT 2024. Contains 371850 sequences. (Running on oeis4.)