A206593 Number of (n+1)X(n+1) 0..3 arrays with every 2X3 or 3X2 subblock having no more than three equal edges, and new values 0..3 introduced in row major order.

15, 9449, 122794254, 23138312968770, 63074271731085058880

Offset

1,1

Comments

Diagonal of A206600

Links

Table of n, a(n) for n=1..5.

Example

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

Crossrefs

Sequence in context: A308156 A396054 A304397 * A200794 A230173 A271403

Adjacent sequences: A206590 A206591 A206592 * A206594 A206595 A206596

Keyword

nonn

Author

R. H. Hardin, Feb 09 2012

Status

approved