A205608 Number of (n+1)X8 0..3 arrays with every 2X2 subblock having the same number of equal edges as its horizontal neighbors and a different number from its vertical neighbors, and new values 0..3 introduced in row major order

698747, 96151010, 15496775389, 2395790751806, 409909278230699, 64469298849716708

Offset

1,1

Comments

Column 7 of A205609

Links

Table of n, a(n) for n=1..6.

Example

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

Crossrefs

Sequence in context: A206518 A114676 A319917 * A205439 A027829 A258129

Adjacent sequences: A205605 A205606 A205607 * A205609 A205610 A205611

Keyword

nonn

Author

R. H. Hardin Jan 29 2012

Status

approved