A226403 - OEIS

%I #10 Mar 31 2024 17:12:36

%S 2,128,756,2498,6900,17812,37358,72000,130722,224132,367754,580236,

%T 887652,1319408,1912914,2712244

%N Number of nondecreasing -n..n vectors of length 6 whose dot product with some nonincreasing -n..n vector equals 6.

%e Some solutions for n=3:

%e   2  -1  -3  -3  -3  -3  -2  -3   0  -2  -3  -2  -3  -2  -3  -1

%e   3  -1  -3  -3   0  -1  -2   0   1  -1   0  -2  -2  -2  -3  -1

%e   3  -1  -3  -2   3  -1  -1   0   3   0   1  -2  -2  -2  -3  -1

%e   3  -1  -2  -2   3   2  -1   0   3   0   2  -2  -2  -1  -3  -1

%e   3   1   1  -2   3   2   1   2   3   0   3   2  -2   2  -1  -1

%e   3   1   3   3   3   3   3   3   3   0   3   2  -1   2  -1   2

%Y Row 6 of A226398.

%K nonn,more

%O 1,1

%A _R. H. Hardin_, Jun 06 2013