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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.
1
3490700, 1336717872, 545700470559, 223459321298323, 91342751431917271, 37329289868928312037, 15245666610881157061902, 6226771909851135513221100, 2542604116386266994899929934, 1038308180737975215393212045381
OFFSET
1,1
COMMENTS
Column 6 of A205768.
LINKS
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
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 30 2012
STATUS
approved