A200198 Number of -2..2 arrays x(0..n+2) of n+3 elements with zero sum and nonzero second and third differences.

68, 246, 1042, 3940, 16092, 63326, 256314, 1028100, 4169932, 16889228, 68746558, 279997576, 1143494160, 4675439056, 19150647962, 78534289030, 322481118006, 1325578996662, 5454538071104, 22464846352590, 92602356718092

Offset

1,1

Comments

Column 2 of A200204

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

Some solutions for n=3
..1....0....1....2....1....1....0....2...-2....0...-2....2...-2...-1....0...-1
.-2....2...-2...-1...-2...-2....1....1....2...-1....0...-2....0....1...-1....2
..1...-2....1....0....2....2....1...-2....2....0...-1...-2...-1...-2...-1....0
..1....0....0...-2....0....1...-1...-2....0....2...-1....1....2....1....1....1
.-1....1....1....1....0...-1....0....0....0...-1....2....1...-1...-1...-1...-1
..0...-1...-1....0...-1...-1...-1....1...-2....0....2....0....2....2....2...-1

Crossrefs

Sequence in context: A317807 A292344 A189810 * A237745 A237740 A290173

Adjacent sequences: A200195 A200196 A200197 * A200199 A200200 A200201

Keyword

nonn

Author

R. H. Hardin, Nov 14 2011

Status

approved