A206203 Number of (n+1)X6 0..3 arrays with every 2X3 or 3X2 subblock having exactly one clockwise edge increases

29724, 22576, 27400, 70168, 118936, 236488, 713408, 1226384, 2475328, 7286528, 12463904, 24915264, 72915680, 124641664, 249152672, 729156800, 1246416640, 2491526720, 7291568000, 12464166400, 24915267200, 72915680000, 124641664000

Offset

1,1

Comments

Column 5 of A206206

Links

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

Formula

Empirical: a(n) = 10*a(n-3) for n>15

Example

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

Crossrefs

Sequence in context: A204601 A203502 A228544 * A204283 A251054 A206070

Adjacent sequences: A206200 A206201 A206202 * A206204 A206205 A206206

Keyword

nonn

Author

R. H. Hardin Feb 04 2012

Status

approved