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

1, 201, 89293, 101095392, 343737526300, 3748133016211929, 134623935213997208181, 16106430235512371314453933

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