A206110 Number of (n+1) X (n+1) 0..3 arrays with every 2 X 3 or 3 X 2 subblock having exactly two counterclockwise and two clockwise edge increases.

256, 5228, 88596, 5048352, 190349280, 24408220320, 10214794664928, 3260439951760800, 3545593194352716000, 12774731370996169188000, 35992614807976653175327200, 345829680669306156240540420000

Offset

1,1

Comments

Diagonal of A206118.

Links

R. H. Hardin, Table of n, a(n) for n = 1..13

Example

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

Crossrefs

Sequence in context: A016804 A115111 A200790 * A196152 A113173 A223964

Adjacent sequences: A206107 A206108 A206109 * A206111 A206112 A206113

Keyword

nonn

Author

R. H. Hardin, Feb 03 2012

Status

approved