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 A210301 Number of (n+1)X(n+1) 0..3 arrays containing all values 0..3 with every 2X2 subblock having one or three distinct values, and new values 0..3 introduced in row major order 0

%I

%S 0,1091,1575467,11061291451,437971830335043,98959142504758664603,

%T 127648944948853198818703027,940014634185937826679488616180507

%N Number of (n+1)X(n+1) 0..3 arrays containing all values 0..3 with every 2X2 subblock having one or three distinct values, and new values 0..3 introduced in row major order

%C Diagonal of A210309

%e Some solutions for n=4

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

%e ..2..1..3..1..2....2..3..1..2..0....0..2..1..3..2....0..2..0..0..0

%e ..1..3..2..2..0....2..0..0..1..2....1..1..3..0..3....3..2..3..1..2

%e ..2..2..1..3..0....3..2..1..2..3....2..3..0..1..0....1..1..2..1..3

%e ..1..3..2..2..2....1..1..3..1..2....2..1..3..3..0....0..2..0..1..2

%K nonn

%O 1,2

%A _R. H. Hardin_ Mar 19 2012

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Last modified March 29 05:39 EDT 2020. Contains 333105 sequences. (Running on oeis4.)