A210334 1/4 the number of (n+1)X8 0..3 arrays with every 2X2 subblock having two or three distinct clockwise edge differences

48410727, 249408131339, 1221987668386411, 6132398417786621509, 30671441607393794461769, 153622523285419300031038131, 769246866811235591580558612197, 3852295230912472939741564317198993

Offset

1,1

Comments

Column 7 of A210335

Links

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

Example

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

Crossrefs

Sequence in context: A022238 A121491 A300568 * A022259 A290501 A016823

Adjacent sequences: A210331 A210332 A210333 * A210335 A210336 A210337

Keyword

nonn

Author

R. H. Hardin Mar 20 2012

Status

approved