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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 1
3275406, 1332632711, 545678293613, 223458785606871, 91342748577948857, 37329289780655758477, 15245666610426961469352, 6226771909834248684544837, 2542604116386182784400024312, 1038308180737971719036992527154 (list; graph; refs; listen; history; text; internal format)
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 A186594 A244574

Adjacent sequences:  A206313 A206314 A206315 * A206317 A206318 A206319

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 06 2012

STATUS

approved

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Last modified August 11 06:25 EDT 2020. Contains 336422 sequences. (Running on oeis4.)