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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 Table of n, a(n) for n=1..47. 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 Adjacent sequences: A200452 A200453 A200454 * A200456 A200457 A200458 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.)