A226424 Number of nondecreasing -n..n vectors of length 3 whose dot product with some lexicographically greater than or equal to nondecreasing -n..n vector equals 3.

4, 20, 61, 104, 186, 275, 431, 585, 848, 1080, 1470, 1822, 2361, 2827, 3543, 4161, 5091, 5878, 7061, 7997, 9430, 10599, 12324, 13755, 15718, 17354, 19743, 21634, 24383, 26528, 29689, 32195, 35801, 38642, 42451, 45645, 50157, 53722, 58752, 62569, 68122

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n = 1..118

Example

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

Crossrefs

Row 3 of A226422.

Sequence in context: A169637 A356012 A169638 * A225260 A131479 A194094

Adjacent sequences: A226421 A226422 A226423 * A226425 A226426 A226427

Keyword

nonn

Author

R. H. Hardin, Jun 06 2013

Status

approved