A276242 - OEIS

A276242

Number of n X n 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.

%I #6 Apr 21 2020 12:47:35

%S 1,9,85,1447,43662,2069454,219977330,41132001645,12485740560874,

%T 8479969482488403,9954378022508358771

%N Number of n X n 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 Diagonal of A276248.

%e Some solutions for n=4

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

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

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

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

%Y Cf. A276248.

%K nonn

%O 1,2

%A _R. H. Hardin_, Aug 25 2016