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%I #6 Apr 20 2020 19:38:56
%S 5,340,17936,542940,8821464,112139348,1135042936,15078628680,
%T 249568483336,2294594493868,25866958553904
%N Number of n X n 0..4 arrays with the absolute differences of each element with its with horizontal and antidiagonal neighbors unique.
%C Diagonal of A265928.
%e Some solutions for n=3
%e ..3..1..4....1..1..4....0..4..3....3..1..1....2..4..3....0..1..1....0..4..3
%e ..2..4..1....3..0..2....1..1..4....4..3..3....0..3..1....3..0..2....2..3..0
%e ..0..3..4....1..3..0....0..4..3....0..0..4....4..1..3....4..1..3....1..0..4
%Y Cf. A265928.
%K nonn
%O 1,1
%A _R. H. Hardin_, Dec 18 2015