A226414 Number of nondecreasing -n..n vectors of length 6 whose dot product with some nondecreasing -n..n vector equals 6.

7, 202, 921, 2959, 7821, 18389, 38225, 73227, 132057, 225713, 369579, 582397, 889777, 1321747, 1915261

Offset

1,1

Links

Table of n, a(n) for n=1..15.

Example

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

Crossrefs

Row 6 of A226410.

Sequence in context: A276537 A233507 A316862 * A226345 A361141 A128680

Adjacent sequences: A226411 A226412 A226413 * A226415 A226416 A226417

Keyword

nonn,more

Author

R. H. Hardin, Jun 06 2013

Status

approved