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A210087 Number of (n+1) X (n+1) 0..2 arrays containing all values 0..2 with every 2 X 2 subblock having one or two distinct values, and new values 0..2 introduced in row major order. 0

%I #9 Dec 26 2023 23:43:38

%S 0,169,57232,57786977,209465946364,2887918719647127,

%T 155235965473002555740,32957218604273839302036966,

%U 27844021444678245712948156418880,94058066849689205593691581157744700550

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

%C Diagonal of A210095.

%e Some solutions for n=4

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

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

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

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

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

%Y Cf. A210095.

%K nonn

%O 1,2

%A _R. H. Hardin_, Mar 17 2012

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Last modified April 19 07:35 EDT 2024. Contains 371782 sequences. (Running on oeis4.)