A206059 Number of (n+1)X5 0..3 arrays with every 2X3 or 3X2 subblock having exactly two clockwise edge increases

170688, 1390488, 11155584, 111242648, 1198231144, 12877680064, 144759802024, 1569116858248, 16924630879224, 190329775107408, 2063119504595544, 22257017331799496, 250239172110308400, 2712629181092377160

Offset

1,1

Comments

Column 4 of A206063

Links

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

Formula

Empirical: a(n) = 1307*a(n-3) +24*a(n-4) +677*a(n-5) +44*a(n-6) +256*a(n-7) for n>16

Example

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

Crossrefs

Sequence in context: A254480 A126894 A251408 * A235238 A236985 A234088

Adjacent sequences: A206056 A206057 A206058 * A206060 A206061 A206062

Keyword

nonn

Author

R. H. Hardin Feb 03 2012

Status

approved