%I #6 Aug 12 2016 06:54:17
%S 24,648,19584,643680,22374144,807480576,29933494272,1132434556416,
%T 43535117537280,1695501057650688,66738461036838912,
%U 2650278622026645504,106030560469874245632,4268836144498501877760,172798003474832717512704
%N Number of 4Xn arrays containing n copies of 0..4-1 with column sums equal.
%C Row 4 of A268472.
%H R. H. Hardin, <a href="/A268473/b268473.txt">Table of n, a(n) for n = 1..188</a>
%e Some solutions for n=3
%e ..2..0..3. .3..3..1. .3..2..0. .2..0..2. .3..2..3. .1..2..3. .1..0..3
%e ..1..2..1. .2..1..2. .0..3..2. .1..2..1. .1..1..1. .0..1..3. .0..1..2
%e ..3..3..2. .0..0..0. .1..1..3. .0..3..0. .2..3..0. .3..1..0. .3..2..1
%e ..0..1..0. .1..2..3. .2..0..1. .3..1..3. .0..0..2. .2..2..0. .2..3..0
%Y Cf. A268472.
%K nonn
%O 1,1
%A _R. H. Hardin_, Feb 05 2016
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