A205983 Number of (n+1)X6 0..2 arrays with every 2X3 or 3X2 subblock having exactly two clockwise edge increases

60432, 140802, 408411, 1814784, 9653376, 50843904, 279003648, 1502833632, 7930959552, 43524639072, 234442046592, 1237229690112, 6789843695232, 36572959268352, 193007831657472, 1059215616456192, 5705381645862912

Offset

1,1

Comments

Column 5 of A205986

Links

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

Formula

Empirical: a(n) = 156*a(n-3) for n>10

Example

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

Crossrefs

Sequence in context: A287047 A075671 A186556 * A218488 A257754 A234767

Adjacent sequences: A205980 A205981 A205982 * A205984 A205985 A205986

Keyword

nonn

Author

R. H. Hardin Feb 02 2012

Status

approved