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A205997 Number of (n+1)X8 0..2 arrays with the number of clockwise edge increases in every 2X2 subblock equal to two, and every 2X2 determinant nonzero 1
54738, 2436706, 111764603, 5195655486, 242338696294, 11329617750556, 529835251171222, 24790817051128828, 1159975071698596954, 54282105915446216444, 2540175779339071267853, 118872371634378189759334 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A205998

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A250857 A083616 A235104 * A091536 A237732 A251164

Adjacent sequences:  A205994 A205995 A205996 * A205998 A205999 A206000

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 02 2012

STATUS

approved

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Last modified February 17 12:14 EST 2020. Contains 331996 sequences. (Running on oeis4.)