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%I #6 Oct 30 2022 06:56:08
%S 0,0,0,1,225,86226,25009492,8099337021,3096486423133,1412534036530778
%N Number of n X 3 arrays containing 3 copies of 0..n-1 with no equal horizontal, vertical, diagonal or antidiagonal neighbors and new values introduced sequentially from 0.
%C Column 3 of A265421.
%e Some solutions for n=6
%e ..0..1..2....0..1..0....0..1..2....0..1..2....0..1..2....0..1..2....0..1..2
%e ..3..4..0....2..3..4....2..3..4....3..4..3....2..3..4....3..4..3....3..4..3
%e ..5..1..3....5..1..2....1..0..5....5..2..5....0..1..0....2..1..2....2..5..0
%e ..4..2..5....3..4..3....4..3..1....1..0..4....5..4..5....4..3..5....4..3..1
%e ..5..3..1....5..2..5....5..2..5....4..2..1....3..2..3....5..1..0....5..0..5
%e ..0..4..2....0..4..1....3..0..4....3..0..5....5..1..4....0..4..5....4..2..1
%Y Cf. A265421.
%K nonn
%O 1,5
%A _R. H. Hardin_, Dec 08 2015
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