A206316 Number of (n+1)X7 0..3 arrays with the number of clockwise edge increases in every 2X2 subblock equal to two, and every 2X2 determinant nonzero

3275406, 1332632711, 545678293613, 223458785606871, 91342748577948857, 37329289780655758477, 15245666610426961469352, 6226771909834248684544837, 2542604116386182784400024312, 1038308180737971719036992527154

Offset

1,1

Comments

Column 6 of A206318

Links

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

Example

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

Crossrefs

Sequence in context: A217110 A217111 A036471 * A186959 A369897 A186594

Adjacent sequences: A206313 A206314 A206315 * A206317 A206318 A206319

Keyword

nonn

Author

R. H. Hardin Feb 06 2012

Status

approved