A206189 Number of (n+1)X(n+1) 0..3 arrays with the number of clockwise edge increases in every 2X2 subblock equal to two

124, 18172, 13173864, 46704516192, 806129409968360, 67595116900832029672, 27501116060342502948845780, 54245028887229452020237690008284

Offset

1,1

Comments

Diagonal of A206197

Links

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

Example

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

Crossrefs

Sequence in context: A035816 A206077 A097842 * A299828 A280905 A146516

Adjacent sequences: A206186 A206187 A206188 * A206190 A206191 A206192

Keyword

nonn

Author

R. H. Hardin Feb 04 2012

Status

approved