A226345 Number of nondecreasing -n..n vectors of length 6 whose dot product with some other -n..n vector equals 6.

7, 202, 921, 2973, 7951, 18509, 38678, 74349, 134305, 229757, 376240, 592561

Offset

1,1

Links

Table of n, a(n) for n=1..12.

Example

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

Crossrefs

Row 6 of A226340.

Sequence in context: A233507 A316862 A226414 * A361141 A128680 A292332

Adjacent sequences: A226342 A226343 A226344 * A226346 A226347 A226348

Keyword

nonn,more

Author

R. H. Hardin, Jun 04 2013

Status

approved