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%I #4 Oct 16 2015 07:31:30
%S 5,29,865,24711,826249,27274339,943196037,32850517101,1149496602927,
%T 40220123519645,1407588920518393,49261304582570101,
%U 1724108144663303417,60343312266592642007,2112014898505756338577,73920482899832743087347
%N Number of (n+1)X(4+1) 0..2 arrays with each row and column divisible by 7, read as a base-3 number with top and left being the most significant digits.
%C Column 4 of A263373.
%H R. H. Hardin, <a href="/A263369/b263369.txt">Table of n, a(n) for n = 1..210</a>
%e Some solutions for n=4
%e ..0..0..2..1..0....1..0..1..0..1....0..1..0..2..2....1..1..0..1..1
%e ..1..2..0..1..2....1..1..2..0..0....1..1..2..0..0....0..0..0..0..0
%e ..0..1..0..0..1....2..0..2..0..2....0..0..0..2..1....0..1..0..0..1
%e ..0..0..2..1..0....0..2..0..0..2....0..1..0..0..1....1..2..0..1..2
%e ..1..0..0..1..0....0..2..1..0..0....1..1..2..2..1....0..2..0..0..2
%Y Cf. A263373.
%K nonn
%O 1,1
%A _R. H. Hardin_, Oct 16 2015