A206541 Number of (n+1) X 8 0..2 arrays with the number of clockwise edge increases in 2 X 2 subblocks nondecreasing, and counterclockwise edge increases nonincreasing, rightwards and downwards.

469617, 25900263, 1567749888, 100259781690, 6556642024200, 433165769694465, 28770371143057311, 1915604623565617890, 127722868372348334343, 8521820836493432131926, 568800839142318486776736

Offset

1,1

Comments

Column 7 of A206542.

Links

R. H. Hardin, Table of n, a(n) for n = 1..93

Example

Some solutions for n=4:
..0..1..2..1..2..0..1..2....2..1..0..2..0..2..1..2....2..2..0..1..1..1..0..0
..1..2..0..2..1..2..0..1....0..2..1..0..1..0..2..1....2..0..0..0..1..0..0..1
..0..1..2..0..2..0..1..2....2..0..2..1..0..1..0..2....2..2..2..0..1..0..1..1
..2..0..1..2..0..1..2..1....1..2..1..2..1..2..1..0....1..1..2..0..0..0..0..0
..0..1..2..0..2..0..1..0....2..0..2..0..2..0..2..1....1..2..2..0..2..2..2..1

Crossrefs

Sequence in context: A227767 A328255 A092010 * A346110 A204761 A164973

Adjacent sequences: A206538 A206539 A206540 * A206542 A206543 A206544

Keyword

nonn

Author

R. H. Hardin, Feb 09 2012

Status

approved