A210153 1/4 the number of (n+1)X6 0..3 arrays with every 2X2 subblock having one, three or four distinct clockwise edge differences

2433709, 5997955680, 14734218092801, 36208249913281496, 88975418528153598168, 218642562001425020608504, 537278068297042230986389307, 1320272420115802027617060782841

Offset

1,1

Comments

Column 5 of A210156

Links

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

Example

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

Crossrefs

Sequence in context: A251805 A184669 A184569 * A144588 A022216 A257195

Adjacent sequences: A210150 A210151 A210152 * A210154 A210155 A210156

Keyword

nonn

Author

R. H. Hardin Mar 18 2012

Status

approved