A205766 Number of (n+1) X 7 0..3 arrays with every 2 X 2 subblock having nonzero determinant and having the same number of clockwise edge increases as its horizontal and vertical neighbors.

3490700, 1336717872, 545700470559, 223459321298323, 91342751431917271, 37329289868928312037, 15245666610881157061902, 6226771909851135513221100, 2542604116386266994899929934, 1038308180737975215393212045381

Offset

1,1

Comments

Column 6 of A205768.

Links

R. H. Hardin, Table of n, a(n) for n = 1..66

Example

Some solutions for 5 X 5
..2..3..2..0..1..3..3....1..0..1..2..1..3..2....0..3..0..2..2..3..1
..1..1..0..1..3..1..0....2..1..2..1..2..0..3....1..0..2..0..3..1..2
..0..2..1..3..1..0..2....0..2..3..2..3..1..0....3..1..3..2..1..3..1
..2..3..2..0..2..1..3....3..0..1..3..2..2..1....2..1..0..3..2..1..0
..2..1..3..1..3..2..1....0..2..0..2..1..3..2....1..0..1..0..3..2..1

Crossrefs

Cf. A205768.

Sequence in context: A204335 A365888 A240105 * A183790 A256770 A106812

Adjacent sequences: A205763 A205764 A205765 * A205767 A205768 A205769

Keyword

nonn

Author

R. H. Hardin, Jan 30 2012

Status

approved