A209959 Number of (n+1)X8 0..2 arrays with every 2X2 subblock having one, three or four distinct clockwise edge differences

18289737, 54603359537, 161711349015585, 479493044479186433, 1421470275154962255801, 4214142277487028096606145, 12493316536665519357482808705, 37037944370044063974355915754673

Offset

1,1

Comments

Column 7 of A209960

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A073032 A222977 A203884 * A140171 A185854 A073033

Adjacent sequences: A209956 A209957 A209958 * A209960 A209961 A209962

Keyword

nonn

Author

R. H. Hardin Mar 16 2012

Status

approved