A205982 Number of (n+1)X5 0..2 arrays with every 2X3 or 3X2 subblock having exactly two clockwise edge increases

11568, 33504, 103998, 419088, 1814784, 7793856, 35107968, 152423040, 654688608, 2949069312, 12803535360, 54993843072, 247721822208, 1075496970240, 4619482818048, 20808633065472, 90341745500160, 388036556716032

Offset

1,1

Comments

Column 4 of A205986

Links

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

Formula

Empirical: a(n) = 84*a(n-3) for n>9

Example

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

Crossrefs

Sequence in context: A063064 A205268 A063434 * A066055 A371390 A184685

Adjacent sequences: A205979 A205980 A205981 * A205983 A205984 A205985

Keyword

nonn

Author

R. H. Hardin Feb 02 2012

Status

approved