A205362 Number of (n+1)X(n+1) 0..3 arrays with the number of clockwise edge increases in every 2X2 subblock the same

256, 31848, 17552984, 50678667832, 816001498671156, 67662059756253796792, 27502351524660234481657420

Offset

1,1

Comments

Diagonal of A205370

Links

Table of n, a(n) for n=1..7.

Example

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

Crossrefs

Sequence in context: A181243 A205634 A269292 * A206101 A221091 A205458

Adjacent sequences: A205359 A205360 A205361 * A205363 A205364 A205365

Keyword

nonn

Author

R. H. Hardin Jan 26 2012

Status

approved