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A210166 Number of (n+1)X(n+1) 0..3 arrays containing all values 0..3 with every 2X2 subblock having two or four distinct values, and new values 0..3 introduced in row major order 0
1, 201, 89293, 101095392, 343737526300, 3748133016211929, 134623935213997208181, 16106430235512371314453933 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Diagonal of A210174

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for n=4

..0..1..1..1..0....0..0..1..0..1....0..0..0..1..1....0..0..0..0..1

..0..0..1..0..1....1..0..0..0..1....1..1..0..0..0....0..1..0..1..0

..0..1..0..1..1....2..3..3..0..0....0..1..0..1..0....2..3..2..3..2

..1..0..0..0..0....2..2..2..1..0....0..0..1..0..0....2..2..2..2..3

..1..0..2..0..3....3..2..0..3..2....2..0..1..0..3....0..0..0..0..1

CROSSREFS

Sequence in context: A167070 A175188 A227152 * A216376 A166505 A066130

Adjacent sequences:  A210163 A210164 A210165 * A210167 A210168 A210169

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 18 2012

STATUS

approved

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Last modified December 19 07:22 EST 2014. Contains 252186 sequences.