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A202713 Number of n X n 0..3 arrays with row sums equal and no column sum equal to the previous.

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%I A202713 #7 Jul 22 2025 16:46:54
%S A202713 4,28,4740,7788648,189412482924
%N A202713 Number of n X n 0..3 arrays with row sums equal and no column sum equal to the previous.
%C A202713 Column 3 of A202714
%e A202713 Some solutions for n=3
%e A202713 ..0..2..3....0..3..3....0..3..2....2..3..2....1..2..3....2..1..1....0..1..3
%e A202713 ..2..0..3....2..2..2....2..1..2....3..1..3....2..2..2....3..0..1....0..3..1
%e A202713 ..2..0..3....3..2..1....0..3..2....3..1..3....0..3..3....2..0..2....1..1..2
%K A202713 nonn
%O A202713 1,1
%A A202713 _R. H. Hardin_ Dec 23 2011

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