A210117 Number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having two or four distinct values, and new values 0..3 introduced in row major order

8, 481, 122093, 112952832, 357147640252, 3796186901665625, 135173360687873175669, 16126587500959731175247693

Offset

1,1

Comments

Diagonal of A210125

Links

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

Example

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

Crossrefs

Sequence in context: A279383 A054326 A203526 * A204564 A152495 A197096

Adjacent sequences: A210114 A210115 A210116 * A210118 A210119 A210120

Keyword

nonn

Author

R. H. Hardin Mar 17 2012

Status

approved