A205614 Number of 7X(n+1) 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

937926, 60868362, 3128383392, 230158920084, 13403364530330, 1046956456530150, 64469298849716708

Offset

1,1

Comments

Row 6 of A205609

Links

Table of n, a(n) for n=1..7.

Example

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

Crossrefs

Sequence in context: A075008 A244564 A104929 * A198780 A104940 A203893

Adjacent sequences: A205611 A205612 A205613 * A205615 A205616 A205617

Keyword

nonn

Author

R. H. Hardin Jan 29 2012

Status

approved