A226413 Number of nondecreasing -n..n vectors of length 5 whose dot product with some nondecreasing -n..n vector equals 5.

6, 100, 418, 1123, 2841, 5567, 10865, 18583, 31261, 48727, 75757, 109221, 159501, 220447, 304821, 405909, 543893, 699387, 910035, 1147085, 1450099, 1791973

Offset

1,1

Links

Table of n, a(n) for n=1..22.

Example

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

Crossrefs

Row 5 of A226410.

Sequence in context: A360339 A127636 A281502 * A226344 A278430 A131311

Adjacent sequences: A226410 A226411 A226412 * A226414 A226415 A226416

Keyword

nonn,more

Author

R. H. Hardin, Jun 06 2013

Status

approved