A226342 Number of nondecreasing -n..n vectors of length 3 whose dot product with some other -n..n vector equals 3.

4, 23, 74, 130, 242, 362, 578, 786, 1138, 1442, 1962, 2418, 3138, 3738, 4650, 5450, 6666, 7658, 9170, 10354, 12154, 13634, 15834, 17610, 20090, 22154, 25130, 27482, 30954, 33594, 37554, 40690, 45130, 48650, 53354, 57258, 62874, 67266, 73458, 78130

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n = 1..87

Example

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

Crossrefs

Row 3 of A226340.

Sequence in context: A065972 A132112 A226411 * A071246 A219933 A304305

Adjacent sequences: A226339 A226340 A226341 * A226343 A226344 A226345

Keyword

nonn

Author

R. H. Hardin, Jun 04 2013

Status

approved