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Number of nX7 nonnegative integer arrays with new values introduced in each row and column in sequential order starting with zero.
1

%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