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

54738, 2436706, 111764603, 5195655486, 242338696294, 11329617750556, 529835251171222, 24790817051128828, 1159975071698596954, 54282105915446216444, 2540175779339071267853, 118872371634378189759334

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