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A206315 Number of (n+1)X6 0..3 arrays with the number of clockwise edge increases in every 2X2 subblock equal to two, and every 2X2 determinant nonzero 1
418468, 77132181, 14309749540, 2656145209648, 492612276280514, 91342748577948857, 16933907482183625564, 3139181759716837800994, 581918239365125184573987, 107870252944675279760828811 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A206318

LINKS

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

EXAMPLE

Some solutions for n=4

..2..0..3..0..1..0....3..2..3..1..2..2....3..2..1..1..0..1....1..3..0..2..3..0

..1..1..0..1..0..3....2..1..2..1..0..3....1..0..3..2..1..0....3..1..3..0..2..2

..0..3..1..3..2..0....0..2..3..2..1..0....2..1..0..3..2..1....1..3..0..1..0..3

..2..0..2..1..3..1....3..2..0..3..2..1....3..2..1..0..3..2....2..0..1..3..2..1

..3..1..3..2..1..2....2..3..1..0..3..2....1..3..2..1..0..3....1..2..1..0..3..2

CROSSREFS

Sequence in context: A259404 A116936 A255081 * A184373 A164729 A164730

Adjacent sequences:  A206312 A206313 A206314 * A206316 A206317 A206318

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 06 2012

STATUS

approved

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Last modified December 6 18:16 EST 2021. Contains 349567 sequences. (Running on oeis4.)