A210076 1/4 the number of (n+1)X8 0..3 arrays with every 2X2 subblock having one or three distinct clockwise edge differences

21997263, 62718516080, 172422974616663, 488107505505461510, 1381457704957416300604, 3915601347858378096451905, 11099179467499737412764448230, 31464520922760215368399966974386

Offset

1,1

Comments

Column 7 of A210077

Links

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

Example

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

Crossrefs

Sequence in context: A364435 A118860 A186595 * A184375 A183799 A205096

Adjacent sequences: A210073 A210074 A210075 * A210077 A210078 A210079

Keyword

nonn

Author

R. H. Hardin Mar 17 2012

Status

approved