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A229867 Number of n X n 0..3 arrays with corresponding row and column sums equal 0

%I

%S 4,64,8704,15106048,354003288064,115737559589453824,

%T 542277543422445827915776

%N Number of n X n 0..3 arrays with corresponding row and column sums equal

%C Column 3 of A229870

%e Some solutions for n=4

%e ..0..0..2..2....0..2..0..2....0..0..2..2....0..2..0..0....0..2..2..0

%e ..2..1..0..2....0..0..2..0....0..2..3..2....2..3..3..0....2..1..1..0

%e ..1..2..1..2....3..0..2..1....3..2..1..1....0..0..1..3....2..0..3..2

%e ..1..2..3..2....1..0..2..0....1..3..1..0....0..3..0..0....0..1..1..1

%K nonn

%O 1,1

%A _R. H. Hardin_, Oct 01 2013

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Last modified October 22 07:06 EDT 2021. Contains 348160 sequences. (Running on oeis4.)