A206046 Number of (n+1)X(n+1) 0..2 arrays with the number of clockwise edge increases in every 2X2 subblock equal to one

48, 2310, 295392, 99399924, 86276125692, 192565971689028, 1102253485190936160, 16166591528019333325686, 607114854619773061565096460, 58357759658347780979413921776468

Offset

1,1

Comments

Diagonal of A206054

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Sequence in context: A227139 A009992 A042105 * A079240 A360904 A275564

Adjacent sequences: A206043 A206044 A206045 * A206047 A206048 A206049

Keyword

nonn

Author

R. H. Hardin Feb 03 2012

Status

approved