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%I #9 Mar 23 2024 17:31:56
%S 2,12,20,32,48,64,88,112,136,168,208,232,280,328,360,408,472,520,592,
%T 640,688,768,856,904,984,1080,1152,1224,1336,1400,1520,1616,1696,1824,
%U 1920,1992,2136,2280,2376,2472,2632,2728,2896,3016,3112,3288,3472,3568,3736
%N Number of nondecreasing -n..n vectors of length 2 whose dot product with some nonincreasing -n..n vector equals 2.
%H R. H. Hardin, <a href="/A226399/b226399.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=3:
%e 1 -2 -2 -3 -1 2 -2 -3 -1 0 -1 1 1 -3 -2 -2
%e 2 1 -1 -1 2 2 -2 -2 0 1 -1 1 3 2 0 3
%Y Row 2 of A226398.
%K nonn
%O 1,1
%A _R. H. Hardin_, Jun 06 2013
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