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A200455 Number of -n..n arrays x(0..2) of 3 elements with zero sum and nonzero first and second differences 0
4, 10, 26, 44, 72, 102, 142, 184, 236, 290, 354, 420, 496, 574, 662, 752, 852, 954, 1066, 1180, 1304, 1430, 1566, 1704, 1852, 2002, 2162, 2324, 2496, 2670, 2854, 3040, 3236, 3434, 3642, 3852, 4072, 4294, 4526, 4760, 5004, 5250, 5506, 5764, 6032, 6302, 6582 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Row 1 of A200454
LINKS
FORMULA
Empirical: a(n) = 2*a(n-1) -2*a(n-3) +a(n-4)
EXAMPLE
Some solutions for n=3
..0...-3....2....0....1....3....3...-3...-1....2...-3...-1....2....0...-2....1
..3....1....1....2...-3...-1...-2....3....2...-3....2...-2...-2...-2....2....2
.-3....2...-3...-2....2...-2...-1....0...-1....1....1....3....0....2....0...-3
CROSSREFS
Sequence in context: A335637 A255718 A001214 * A269064 A307415 A322060
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 18 2011
STATUS
approved

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Last modified June 15 16:19 EDT 2024. Contains 373407 sequences. (Running on oeis4.)