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A200197 Number of -1..1 arrays x(0..n+2) of n+3 elements with zero sum and nonzero second and third differences. 1
12, 22, 50, 90, 192, 360, 752, 1472, 3060, 6104, 12596, 25368, 52230, 106038, 218204, 445350, 916598, 1877598, 3866920, 7942794, 16372182, 33699352, 69526894, 143344944, 296012610, 611113112, 1263073756, 2610512928, 5399923198 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 1 of A200204.
LINKS
EXAMPLE
Some solutions for n=3
..0....1....0....0....1....0...-1...-1....0....1....0...-1...-1....1...-1...-1
..0....0....0....1....0...-1....1....0....0....1....0....0....1....0...-1...-1
.-1....0....1....1....0....1...-1....0...-1....0....1....0....0....1....0....1
..1...-1...-1...-1...-1....0....1....1....1....0....1....1....0...-1....0....0
..0...-1....0...-1....0....1....0....0...-1...-1...-1...-1...-1...-1....1....1
..0....1....0....0....0...-1....0....0....1...-1...-1....1....1....0....1....0
CROSSREFS
Cf. A200204.
Sequence in context: A115745 A129639 A153361 * A115709 A115703 A014633
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 14 2011
STATUS
approved

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Last modified June 22 23:47 EDT 2024. Contains 373629 sequences. (Running on oeis4.)