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A226401
Number of nondecreasing -n..n vectors of length 4 whose dot product with some nonincreasing -n..n vector equals 4.
1
2, 48, 146, 448, 912, 1646, 2812, 4564, 6826, 9996, 14208, 19364, 26146, 34488, 44090, 56418, 71092, 87614, 107854, 131136, 156880, 187906, 223218, 261362, 305902, 356414, 410362, 472988, 542558, 615414, 700038, 792754, 890046, 1001146, 1120332
OFFSET
1,1
COMMENTS
Row 4 of A226398.
LINKS
EXAMPLE
Some solutions for n=3:
-2 -2 -3 -1 -3 -2 -3 0 -2 -2 -2 -3 -3 -1 -3 2
1 -2 -1 -1 -3 -2 -3 1 -2 0 0 -2 -3 0 -3 2
2 3 0 -1 -2 -2 0 1 -1 1 3 -2 -2 2 -1 3
3 3 0 -1 -2 3 1 1 3 3 3 2 -1 3 3 3
CROSSREFS
Sequence in context: A195876 A326778 A083251 * A226396 A341110 A075690
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jun 06 2013
STATUS
approved