A211742 Number of -3..3 arrays x(i) of n+1 elements i=1..n+1 with set{t,u,v in 0,1}((x[i+t]+x[j+u]+x[k+v])*(-1)^(t+u+v)) having four, five, six or seven distinct values for every i,j,k<=n

36, 170, 576, 1670, 4536, 12082, 31600, 83854, 221472, 599922, 1621564, 4502630, 12452416, 35319066, 99465560, 286641046, 817809640, 2383330298, 6860877784, 20149044846, 58354995188, 172280429034, 501001658620, 1484437597478

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n = 1..36

Example

Some solutions for n=5
..3...-3....1...-2....2....1...-2...-1...-2....0....1....0....3...-3....0....0
..2...-2....2...-1....1....2...-3...-2...-1...-3....0....2....2....2....1...-3
..0...-3...-3....2....2....0....2....0...-2....0....3...-1...-1...-3....0....0
..2...-2....2....1...-1....2....1...-2...-1....3....0...-2...-3....2...-1....3
..3....1...-3...-2....2....3....2....0....2....0...-1...-1...-1...-1....0...-1
..1....0....1...-3....1....1...-3....3...-1...-1...-3...-2...-3....2...-3....3

Crossrefs

Sequence in context: A330770 A166708 A211731 * A211751 A211762 A219858

Adjacent sequences: A211739 A211740 A211741 * A211743 A211744 A211745

Keyword

nonn

Author

R. H. Hardin Apr 20 2012

Status

approved