A210155 1/4 the number of (n+1)X8 0..3 arrays with every 2X2 subblock having one, three or four distinct clockwise edge differences

502659771, 16211961522199, 520586406508252346, 16724671741551847807857, 537278068297042230986389307, 17260102700582704755575246996125, 554481819709548465938736952622972588

Offset

1,1

Comments

Column 7 of A210156

Links

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

Example

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

Crossrefs

Sequence in context: A101641 A227798 A234063 * A348798 A203261 A207041

Adjacent sequences: A210152 A210153 A210154 * A210156 A210157 A210158

Keyword

nonn

Author

R. H. Hardin Mar 18 2012

Status

approved