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Number of (n+1) X (n+1) 0..2 arrays with every 2 X 2 subblock having the same number of equal edges, and new values 0..2 introduced in row major order.
0

%I #7 Jun 26 2022 02:38:15

%S 14,263,14639,2368164,1002405121,1094476686239,3037575583505983,

%T 21477571401148556382,385928233193168681488351

%N Number of (n+1) X (n+1) 0..2 arrays with every 2 X 2 subblock having the same number of equal edges, and new values 0..2 introduced in row major order.

%C Diagonal of A205475.

%e Some solutions for n=4

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

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

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

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

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

%Y Cf. A205475.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 27 2012