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A233105 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.

%I A233105 #7 Jul 23 2025 07:53:07
%S A233105 1,19,24912,794723482,457873555330159,4655818309443587944819,
%T A233105 835153023014356911992288011287,
%U A233105 2642740111638617064845250032401005032917,147523503812676026261878057522783598121057848912309
%N A233105 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 A233105 Diagonal of A233113
%e A233105 Some solutions for n=3
%e A233105 ..0..1..5....0..1..0....0..1..2....0..1..2....0..1..5....0..0..0....0..1..0
%e A233105 ..4..2..4....1..5..4....4..3..1....2..1..2....2..1..1....0..1..1....4..2..2
%e A233105 ..0..2..4....0..4..4....5..1..1....4..3..4....2..2..1....0..0..2....2..5..4
%K A233105 nonn
%O A233105 1,2
%A A233105 _R. H. Hardin_, Dec 04 2013