A206540 Number of (n+1) X 7 0..2 arrays with the number of clockwise edge increases in 2 X 2 subblocks nondecreasing, and counterclockwise edge increases nonincreasing, rightwards and downwards.

110769, 3902463, 150387285, 6062752884, 249853070682, 10370489275269, 433165769694465, 18115074102295746, 759196260042210954, 31822407182233848810, 1334925952358094973038, 55997558706291917520756

Offset

1,1

Comments

Column 6 of A206542.

Links

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

Example

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

Crossrefs

Sequence in context: A254853 A250533 A251191 * A251034 A265713 A114684

Adjacent sequences: A206537 A206538 A206539 * A206541 A206542 A206543

Keyword

nonn

Author

R. H. Hardin, Feb 09 2012

Status

approved