A206009 Number of (n+1)X8 0..2 arrays with the number of clockwise edge increases in every 2X2 subblock equal to one, and every 2X2 determinant nonzero

19976, 154346, 419108, 3850160, 10015204, 107546742, 262845336, 3293852332, 7479127840, 108357430282, 227813014264, 3756346648828, 7338047067232, 135120468767082, 247233543550964, 4986193466694554, 8631536008169084

Offset

1,1

Comments

Column 7 of A206010

Links

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

Example

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

Crossrefs

Sequence in context: A324594 A203045 A307474 * A035926 A090072 A236115

Adjacent sequences: A206006 A206007 A206008 * A206010 A206011 A206012

Keyword

nonn

Author

R. H. Hardin Feb 02 2012

Status

approved