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A231212 Number of (n+1)X(n+1) 0..2 arrays with no element unequal to a strict majority of its horizontal and vertical neighbors, with values 0..2 introduced in row major order.

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%I A231212 #6 Jul 23 2025 06:18:16
%S A231212 3,9,93,2892,226764,45593903,23748656906,31822302958042
%N A231212 Number of (n+1)X(n+1) 0..2 arrays with no element unequal to a strict majority of its horizontal and vertical neighbors, with values 0..2 introduced in row major order.
%C A231212 Diagonal of A231219
%e A231212 Some solutions for n=4
%e A231212 ..0..0..0..0..1....0..0..0..1..1....0..0..1..1..2....0..1..1..1..1
%e A231212 ..1..1..0..0..1....0..0..0..1..1....0..0..1..1..2....0..1..1..1..1
%e A231212 ..1..1..1..1..1....1..1..0..1..1....2..2..2..2..2....0..0..0..0..0
%e A231212 ..1..0..0..0..0....1..1..0..0..1....2..2..0..0..0....0..1..1..0..0
%e A231212 ..1..0..0..0..0....1..1..0..0..1....2..2..0..0..0....0..1..1..0..0
%K A231212 nonn
%O A231212 1,1
%A A231212 _R. H. Hardin_, Nov 05 2013

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