%I #4 Jan 25 2016 21:22:47
%S 1,64,10438,3168306,1412290158,795460720710,517992936833258,
%T 369867566612849678,280350778114908738774,221061578416502345763162,
%U 179038866982147711159785106,147727481298984892538689733334
%N Number of nX7 nonnegative integer arrays with new values introduced in each row and column in sequential order starting with zero.
%C Column 7 of A268079.
%H R. H. Hardin, <a href="/A268078/b268078.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=3
%e ..0..0..0..0..0..0..0....0..0..0..0..0..0..0....0..0..0..0..0..0..0
%e ..0..0..0..1..0..0..0....0..1..1..1..0..1..1....0..0..0..0..0..1..1
%e ..0..0..1..0..0..0..1....0..0..0..0..0..0..0....0..0..0..0..1..0..1
%Y Cf. A268079.
%K nonn
%O 1,2
%A _R. H. Hardin_, Jan 25 2016