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%I #4 Mar 14 2013 06:49:46
%S 64,1080,38512,899390,22520656,462313688,9567328752,178464221290,
%T 3336648010448,58641450033936,1033599371410096,17499076161248060,
%U 297470720803662048,4917593684170711306,81699455573347788176
%N Number of nX3 0..3 arrays with successive rows and columns fitting to straight lines with nondecreasing slope, with a single point array taken as having zero slope
%C Column 3 of A223071
%H R. H. Hardin, <a href="/A223070/b223070.txt">Table of n, a(n) for n = 1..25</a>
%e Some solutions for n=3
%e ..2..2..2....0..0..0....3..2..0....2..0..0....0..0..0....3..3..1....2..0..2
%e ..1..0..2....1..0..2....0..2..1....1..1..3....1..2..3....1..0..1....1..2..2
%e ..1..3..3....2..2..3....0..3..2....0..2..2....0..2..3....0..1..3....0..0..2
%K nonn
%O 1,1
%A _R. H. Hardin_ Mar 14 2013