A210078 Number of (n+1)X(n+1) 0..3 arrays containing all values 0..3 with every 2X2 subblock having one, three or four distinct values, and new values 0..3 introduced in row major order

1, 2384, 7853122, 198214365329, 41562565414532492, 72599208478326114502304, 1056388250136945583891331683046, 128049790734830830744725613641587707522

Offset

1,2

Comments

Diagonal of A210086

Links

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

Example

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

Crossrefs

Sequence in context: A218849 A254562 A186867 * A172653 A172677 A172772

Adjacent sequences: A210075 A210076 A210077 * A210079 A210080 A210081

Keyword

nonn

Author

R. H. Hardin Mar 17 2012

Status

approved