%I #4 Jun 06 2013 06:35:40
%S 2,20,68,146,258,756,1012,1866,3762,5020,6854,13706,15514,22540,38982,
%T 43620,54834,96164,98406,128232,207814,213600,253828,414128,402352,
%U 495006,764912,744280,859550,1342098,1253162,1483672,2231178,2095910
%N Number of nondecreasing -3..3 vectors of length n whose dot product with some nonincreasing -3..3 vector equals n
%C Column 3 of A226398
%H R. H. Hardin, <a href="/A226394/b226394.txt">Table of n, a(n) for n = 1..41</a>
%e Some solutions for n=3
%e ..2...-3...-1....0...-3...-1...-3...-3...-3...-3....3....1...-3...-3...-3...-3
%e ..2...-3...-1....1...-3....0...-2...-2...-1....2....3....2....1....0...-2...-1
%e ..3...-1...-1....2....0....3....3....1....2....2....3....3....1....0....0....1
%K nonn
%O 1,1
%A _R. H. Hardin_ Jun 06 2013