A206060 Number of (n+1)X6 0..3 arrays with every 2X3 or 3X2 subblock having exactly two clockwise edge increases

1499080, 11638960, 101369476, 1198231144, 18209383140, 265284773176, 4049733446192, 62573461436920, 917675760715056, 14010280271046248, 216457465434893144, 3174532407620493840, 48466452496861296696

Offset

1,1

Comments

Column 5 of A206063

Links

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

Formula

Empirical: a(n) = 3457*a(n-3) +526*a(n-5) for n>14

Example

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

Crossrefs

Sequence in context: A297881 A335289 A228761 * A251973 A236499 A210018

Adjacent sequences: A206057 A206058 A206059 * A206061 A206062 A206063

Keyword

nonn

Author

R. H. Hardin Feb 03 2012

Status

approved