%I #6 Mar 31 2012 12:36:20
%S 2,9,28,78,171,350,650,1142,1868,2949,4454,6554,9361,13071,17829,
%T 23929,31576,41080,52705,66899,83871,104326,128432,156793,190022,
%U 228672,273250,324752,383434,450569,526647,612832,709667,818736,940570,1076447,1227802
%N Number of 1X6 integer matrices with each row summing to zero, row elements in nondecreasing order, rows in lexicographically nondecreasing order, and the sum of squares of the elements <= 2*n^2 (number of collections of 1 zero-sum 6-vectors with total modulus squared not more than 2*n^2, ignoring vector and component permutations)
%C Column (1,6,n) of A192710
%H R. H. Hardin, <a href="/A192693/b192693.txt">Table of n, a(n) for n = 1..200</a>
%e Some solutions for 1X6 <= 2*4^2
%e .-3.-2..0..0..2..3...-3.-1..0..0..2..2...-3.-1.-1.-1..3..3...-3.-2.-1..1..2..3
%K nonn
%O 1,1
%A _R. H. Hardin_ Jul 07 2011
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