A209854 1/4 the number of (n+1)X5 0..3 arrays with every 2X2 subblock having one or four distinct clockwise edge differences

9455, 661963, 45071990, 3111914707, 213959648565, 14741920546390, 1014683000461958, 69877891568505574, 4810912751472199040, 331268218089091178660, 22808554042049077880530, 1570485935577042648260737

Offset

1,1

Comments

Column 4 of A209858

Links

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

Example

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

Crossrefs

Sequence in context: A035792 A252704 A202099 * A235734 A235515 A161726

Adjacent sequences: A209851 A209852 A209853 * A209855 A209856 A209857

Keyword

nonn

Author

R. H. Hardin Mar 14 2012

Status

approved