A209911 Half the number of (n+1)X7 0..3 arrays with every 2X2 subblock having two or four distinct clockwise edge differences

3573388, 3452051294, 3063300023090, 2771380588485262, 2497054784947973388, 2253166071062026531552, 2032217168415654090395276, 1833259667261950945314036728, 1653671485554060485462472516346

Offset

1,1

Comments

Column 6 of A209913

Links

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

Example

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

Crossrefs

Sequence in context: A198167 A329578 A053078 * A235077 A353221 A352220

Adjacent sequences: A209908 A209909 A209910 * A209912 A209913 A209914

Keyword

nonn

Author

R. H. Hardin Mar 15 2012

Status

approved