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A226400
Number of nondecreasing -n..n vectors of length 3 whose dot product with some nonincreasing -n..n vector equals 3.
1
2, 12, 68, 120, 224, 344, 552, 752, 1100, 1398, 1904, 2356, 3062, 3650, 4558, 5348, 6544, 7526, 9010, 10184, 11972, 13438, 15608, 17376, 19826, 21872, 24828, 27166, 30592, 33222, 37132, 40254, 44680, 48172, 52840, 56726, 62294, 66656, 72826, 77476
OFFSET
1,1
LINKS
EXAMPLE
Some solutions for n=3:
-2 0 0 -1 -2 -2 0 -1 -3 -2 0 -3 -1 -3 -3 -1
0 0 2 0 -2 3 0 0 -3 2 3 0 -1 -3 2 -1
1 3 3 0 1 3 1 3 3 3 3 2 1 -3 2 3
CROSSREFS
Row 3 of A226398.
Sequence in context: A020062 A185035 A185235 * A000954 A056636 A174327
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jun 06 2013
STATUS
approved