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

%I #6 Apr 21 2020 12:48:05

%S 1,4,45,1017,50949,4988145,1073114625,456837553545,427500156271073,

%T 794420496019076757,3247016064162495298253

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

%C Diagonal of A276299.

%e Some solutions for n=4

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

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

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

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

%Y Cf. A276299.

%K nonn

%O 1,2

%A _R. H. Hardin_, Aug 28 2016