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A233245 Number of 7Xn 0..5 arrays with no element x(i,j) adjacent to value 5-x(i,j) horizontally, diagonally or antidiagonally, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order 1

%I #4 Dec 06 2013 13:57:30

%S 6896,53692063,633724470764,7415057313896849,86961450397919224924,

%T 1019972250198681748495759,11963921132630138069523033663,

%U 140334092336070663237513533114112,1646091578322294419786739964245190052

%N Number of 7Xn 0..5 arrays with no element x(i,j) adjacent to value 5-x(i,j) horizontally, diagonally or antidiagonally, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order

%C Row 7 of A233239

%H R. H. Hardin, <a href="/A233245/b233245.txt">Table of n, a(n) for n = 1..21</a>

%e Some solutions for n=2

%e ..0..0....0..0....0..0....0..0....0..0....0..0....0..0....0..0....0..0....0..0

%e ..0..0....0..0....0..0....0..0....0..0....0..0....0..0....0..0....0..0....0..0

%e ..0..1....0..1....0..0....0..1....0..1....0..0....0..0....0..1....0..1....0..1

%e ..2..0....0..0....1..1....2..1....1..0....0..1....0..1....1..2....0..4....2..0

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

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

%e ..1..1....4..3....2..1....2..2....2..2....3..1....4..2....2..2....3..4....3..1

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 06 2013

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Last modified April 24 22:17 EDT 2024. Contains 371964 sequences. (Running on oeis4.)