A210312 Number of (n+1)X(n+1) 0..3 arrays containing all values 0..3 with every 2X2 subblock having two or three distinct values, and new values 0..3 introduced in row major order

0, 4125, 58464712, 7415631633670, 11219641807667569855, 214148948714201593922295166, 51994819539384403072547129110683133, 160715710349516432110880775618321863607017118

Offset

1,2

Comments

Diagonal of A210320

Links

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

Example

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

Crossrefs

Sequence in context: A168462 A045032 A196896 * A125502 A361413 A339798

Adjacent sequences: A210309 A210310 A210311 * A210313 A210314 A210315

Keyword

nonn

Author

R. H. Hardin Mar 20 2012

Status

approved