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%I #7 Jan 20 2024 16:46:22
%S 4,16,610,82188,45453172,99181510254,817394844786996,
%T 26269231937922520406
%N Number of n X n arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random 0..3 n X n array.
%C Diagonal of A218651.
%e Some solutions for n=3
%e ..1..1..3....0..0..1....2..2..3....0..0..3....3..1..1....1..1..1....3..2..2
%e ..1..1..3....0..0..2....1..1..2....0..2..0....1..1..0....1..1..2....3..2..2
%e ..1..1..3....0..3..3....1..1..2....2..0..0....1..0..0....3..2..2....3..2..2
%Y Cf. A218651.
%K nonn
%O 1,1
%A _R. H. Hardin_, Nov 03 2012