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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
0, 169, 57232, 57786977, 209465946364, 2887918719647127, 155235965473002555740, 32957218604273839302036966, 27844021444678245712948156418880, 94058066849689205593691581157744700550 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A210095.

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=4

..0..1..0..2..1....0..0..0..1..2....0..1..2..0..1....0..0..0..0..0

..0..1..0..2..1....0..1..0..1..2....0..1..2..0..1....0..0..1..0..1

..0..0..0..2..2....0..0..0..1..2....0..1..2..0..1....1..1..1..0..0

..0..0..0..2..2....1..0..1..1..1....1..1..2..0..1....1..2..1..1..1

..0..1..0..2..0....0..1..1..2..1....2..1..2..0..0....1..2..1..2..2

CROSSREFS

Cf. A210095.

Sequence in context: A006051 A069742 A069743 * A135824 A195219 A195276

Adjacent sequences:  A210084 A210085 A210086 * A210088 A210089 A210090

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 17 2012

STATUS

approved

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Last modified June 27 04:01 EDT 2022. Contains 354888 sequences. (Running on oeis4.)