A210298 Half the number of (n+1)X7 0..3 arrays with every 2X2 subblock having at most one duplicate clockwise edge difference

61973516, 482519042626, 3744799069935140, 29075895528477825602, 225741948376039857049980, 1752648993312488853687634462, 13607462253433812638431489199962, 105647542211301539024933439827978282

Offset

1,1

Comments

Column 6 of A210300

Links

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

Example

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

Crossrefs

Sequence in context: A059001 A059003 A104931 * A204883 A096559 A203943

Adjacent sequences: A210295 A210296 A210297 * A210299 A210300 A210301

Keyword

nonn

Author

R. H. Hardin Mar 19 2012

Status

approved