A276252 - OEIS

%I #4 Aug 25 2016 11:07:15

%S 122,2304,5671,36744,291113,2069454,17450554,141165944,1075068633,

%T 8722058423,70283762776,549061777779,4393994452605,35216257735083,

%U 278169606460673,2216529301439897,17704473017525506,140499576312114974

%N Number of 6Xn 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 6 of A276248.

%H R. H. Hardin, <a href="/A276252/b276252.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

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

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

%Y Cf. A276248.

%K nonn

%O 1,1

%A _R. H. Hardin_, Aug 25 2016