login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A211756 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 one, two, three, four, five, six or eight distinct values for every i,j,k<=n 1
49, 343, 1953, 8903, 35361, 130515, 461513, 1597311, 5462319, 18645525, 63611685, 218253317, 751458341, 2608225775, 9093362753, 31967242981, 112856339077, 401509863725, 1433663859719, 5154478860067, 18587710922523, 67433575480987 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..27

EXAMPLE

Some solutions for n=5

..3....3....2...-3....0....2....2...-3....0...-1...-3....1...-2....3...-1...-3

..0....2....0...-3...-1....3....2....3...-3....1....1....2...-2....2....2...-3

.-3....0...-2...-3....1...-1....2...-1...-2....0...-2....2...-3...-1....2...-1

..0....3....0....1....0....3...-2....1....3....1....1...-1...-1....2....3....1

.-2....1...-2....0....0....3....2...-1....2....3...-1....2....0....3....2...-3

..0....2....2...-1....1....0...-3...-3...-1....2....3....0...-1...-1....1...-3

CROSSREFS

Sequence in context: A036324 A211736 A211747 * A036323 A066429 A269327

Adjacent sequences:  A211753 A211754 A211755 * A211757 A211758 A211759

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 20 2012

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 3 04:26 EST 2021. Contains 341756 sequences. (Running on oeis4.)