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Number of n X n 0..5 arrays with no element x(i,j) adjacent to value 5-x(i,j) horizontally or vertically, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order
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%I #5 Dec 18 2015 18:18:47

%S 1,19,24912,794723482,457873555330159,4655818309443587944819,

%T 835153023014356911992288011287,

%U 2642740111638617064845250032401005032917,147523503812676026261878057522783598121057848912309

%N Number of n X n 0..5 arrays with no element x(i,j) adjacent to value 5-x(i,j) horizontally or vertically, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order

%C Diagonal of A233113

%e Some solutions for n=3

%e ..0..1..5....0..1..0....0..1..2....0..1..2....0..1..5....0..0..0....0..1..0

%e ..4..2..4....1..5..4....4..3..1....2..1..2....2..1..1....0..1..1....4..2..2

%e ..0..2..4....0..4..4....5..1..1....4..3..4....2..2..1....0..0..2....2..5..4

%K nonn

%O 1,2

%A _R. H. Hardin_, Dec 04 2013