A211597 Number of -2..2 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 two, three, four, six, seven or eight distinct values for every i,j,k<=n

24, 80, 246, 716, 2046, 5782, 16184, 45312, 126250, 353302, 986696, 2770910, 7777304, 21945496, 61932032, 175572572, 497905408, 1417135306, 4034892052, 11520180346, 32901609502, 94162093264, 269546074004, 772772054834

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n = 1..33

Example

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

Crossrefs

Sequence in context: A211575 A211583 A211589 * A318988 A182915 A030622

Adjacent sequences: A211594 A211595 A211596 * A211598 A211599 A211600

Keyword

nonn

Author

R. H. Hardin Apr 16 2012

Status

approved