A210175 Number of (n+1)X(n+1) 0..3 arrays containing all values 0..3 with every 2X2 subblock having three or four distinct values, and new values 0..3 introduced in row major order

1, 2316, 7363642, 178967377396, 35812805301833530, 59168572185919156908468, 807064033391082670768444038930, 90885346773699848616006199051130800984

Offset

1,2

Comments

Diagonal of A210183

Links

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

Example

Some solutions for n=4
..0..0..0..0..0....0..0..1..0..2....0..1..0..0..0....0..0..1..0..2
..1..2..1..2..3....1..2..2..1..1....0..2..1..3..2....1..2..2..0..1
..2..3..3..2..0....0..3..0..0..2....3..1..3..2..0....1..3..1..3..2
..0..0..1..2..3....2..1..1..2..3....1..0..0..0..1....2..3..2..3..0
..2..3..0..2..1....1..0..2..0..2....3..1..2..3..0....0..0..3..1..3

Crossrefs

Sequence in context: A132214 A133538 A075668 * A137733 A205636 A347569

Adjacent sequences: A210172 A210173 A210174 * A210176 A210177 A210178

Keyword

nonn

Author

R. H. Hardin Mar 18 2012

Status

approved