A210004 Number of (n+1)X(n+1) 0..2 arrays containing all values 0..2 with every 2X2 subblock having two or three distinct values, and new values 0..2 introduced in row major order

6, 2691, 5258039, 82060746485, 10768436781440673, 11907389873495805482147, 110953732239747666903878744871, 8712219181636798038727746238089388961, 5764706550248813633817796270775079062768005961

Offset

1,1

Comments

Diagonal of A210012

Links

R. H. Hardin, Table of n, a(n) for n = 1..11

Example

Some solutions for n=4
..0..0..0..0..0....0..0..0..0..1....0..1..0..2..2....0..0..0..1..1
..0..1..0..1..1....0..2..0..1..2....0..0..2..1..0....0..2..2..0..1
..1..1..0..1..2....0..1..0..0..2....1..2..0..2..0....0..1..2..0..2
..2..1..0..1..1....1..1..2..0..0....2..2..2..0..2....1..0..2..0..1
..0..0..2..0..0....1..2..2..2..1....2..0..1..2..0....0..0..0..2..1

Crossrefs

Sequence in context: A181700 A199147 A097871 * A198667 A225066 A001326

Adjacent sequences: A210001 A210002 A210003 * A210005 A210006 A210007

Keyword

nonn

Author

R. H. Hardin Mar 16 2012

Status

approved