A201986 - OEIS

%I #5 Mar 31 2012 12:36:46

%S 18,14107,11648559,7375608084,3674187761233,1507315600099908,

%T 526500713340421071,160321266022658991751,43304255513243305231273,

%U 10515069913569825177115136,2319701107323309166913311672

%N Number of nX4 zero-sum -3..3 arrays with rows and columns lexicographically nondecreasing

%C Column 4 of A201989

%H R. H. Hardin, <a href="/A201986/b201986.txt">Table of n, a(n) for n = 1..12</a>

%e Some solutions for n=2

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Dec 07 2011