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 A221434 Number of nX4 1..(max n,4) arrays with each row and column having unrepeated values 1

%I

%S 24,216,576,576,161280,283046400,782137036800,3563924952268800,

%T 25315180943034286080,269169718618593283276800,

%U 4137679434467601752260608000,89264433387042486497787641856000

%N Number of nX4 1..(max n,4) arrays with each row and column having unrepeated values

%C Column 4 of A221438

%H R. H. Hardin, <a href="/A221434/b221434.txt">Table of n, a(n) for n = 1..15</a>

%e Some solutions for n=3

%e ..2..4..1..3....4..2..3..1....1..3..2..4....4..1..2..3....2..1..3..4

%e ..3..1..4..2....3..1..4..2....2..4..1..3....1..2..3..4....4..3..2..1

%e ..4..2..3..1....1..4..2..3....4..2..3..1....3..4..1..2....3..4..1..2

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 16 2013

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Last modified December 4 17:50 EST 2021. Contains 349526 sequences. (Running on oeis4.)