A206539 Number of (n+1) X 6 0..2 arrays with the number of clockwise edge increases in 2 X 2 subblocks nondecreasing, and counterclockwise edge increases nonincreasing, rightwards and downwards.

26481, 594348, 14528199, 369441411, 9567269487, 249853070682, 6556642024200, 172503406693200, 4545389492802288, 119878356782179572, 3163274433238575696, 83498862564488470557, 2204480938367057407965, 58208728563598806225396

Offset

1,1

Comments

Column 5 of A206542.

Links

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

Example

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

Crossrefs

Sequence in context: A107119 A292701 A275417 * A273260 A015303 A236622

Adjacent sequences: A206536 A206537 A206538 * A206540 A206541 A206542

Keyword

nonn

Author

R. H. Hardin, Feb 09 2012

Status

approved