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A274722 Number of n X n 0..2 arrays with no element equal to any value at offset (-1,-2), (-2,-1) or (-1,0) and new values introduced in order 0..2. 0

%I

%S 1,6,68,1632,84948,8960464,1980677448,905233056800,860544738080372,

%T 1705630286322728068

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

%C Diagonal of A274728.

%e Some solutions for n=4

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

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

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

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

%Y Cf. A274728.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jul 03 2016

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Last modified May 22 13:12 EDT 2022. Contains 353950 sequences. (Running on oeis4.)