A276253 - OEIS

%I #4 Aug 25 2016 11:07:56

%S 365,9216,23000,188696,2003694,18671229,219977330,2410124377,

%T 24361263053,272372552980,2985497491633,31231199543135,

%U 341233988414188,3723139799743418,39589701942441676,428949119346736027

%N Number of 7Xn 0..2 arrays with no element equal to any value at offset (-2,-1) (-1,1) or (0,-2) and new values introduced in order 0..2.

%C Row 7 of A276248.

%H R. H. Hardin, <a href="/A276253/b276253.txt">Table of n, a(n) for n = 1..176</a>

%e Some solutions for n=4

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

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

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

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

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

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

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

%Y Cf. A276248.

%K nonn

%O 1,1

%A _R. H. Hardin_, Aug 25 2016