A226343 Number of nondecreasing -n..n vectors of length 4 whose dot product with some other -n..n vector equals 4.

5, 67, 193, 480, 972, 1736, 2962, 4733, 7063, 10319, 14629, 19869, 26785, 35285, 45069, 57543, 72439, 89195, 109721, 133257, 159325, 190665, 226371, 264885, 309905, 360889, 415399, 478479, 548675, 622131, 707461, 800841, 898901

Offset

1,1

Comments

Row 4 of A226340.

Links

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

Example

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

Crossrefs

Sequence in context: A185230 A142009 A226412 * A067393 A212731 A316146

Adjacent sequences: A226340 A226341 A226342 * A226344 A226345 A226346

Keyword

nonn

Author

R. H. Hardin, Jun 04 2013

Status

approved