A210353 1/4 the number of (n+1)X7 0..3 arrays with every 2X2 subblock having one, two or three distinct clockwise edge differences

5689274, 13085817650, 29234187801911, 66307681156504928, 150365005774145044378, 341167083547574037214431, 774109750788951970050073763, 1756503539641086562853516577253

Offset

1,1

Comments

Column 6 of A210355

Links

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

Example

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

Crossrefs

Sequence in context: A254395 A253983 A246055 * A205045 A139064 A151655

Adjacent sequences: A210350 A210351 A210352 * A210354 A210355 A210356

Keyword

nonn

Author

R. H. Hardin Mar 20 2012

Status

approved