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

%I #6 Apr 21 2020 12:46:59

%S 1,14,126,1176,13104,221184,5360184,188294424,9859695270,753451571736,

%T 86203713522030,14475271269137334

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

%C Diagonal of A275565.

%e Some solutions for n=4

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

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

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

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

%Y Cf. A275565.

%K nonn

%O 1,2

%A _R. H. Hardin_, Aug 01 2016