A206107 Number of (n+1) X 7 0..3 arrays with the number of clockwise edge increases in 2 X 2 subblocks nondecreasing, and counterclockwise edge increases nonincreasing, rightwards and downwards.

3472540, 628383700, 173412646632, 53034080059688, 16603949695703620, 5228849998045900208, 1650022029893268519364, 521190725033616103989460, 164721688003403514434431312, 52079025040696760015544553512

Offset

1,1

Comments

Column 6 of A206109.

Links

R. H. Hardin, Table of n, a(n) for n = 1..23

Example

Some solutions for n=4:
..1..0..0..2..3..2..1....0..3..2..0..0..2..3....3..3..3..1..1..3..1
..1..3..0..2..3..2..1....1..2..2..0..2..2..2....1..1..1..1..3..3..3
..2..3..0..2..2..2..2....2..2..0..0..0..2..1....0..1..3..3..3..2..2
..2..3..0..2..3..2..3....0..2..2..2..2..2..1....0..1..3..0..3..2..3
..2..3..0..2..3..2..2....0..0..0..2..3..2..1....1..1..3..0..3..3..3

Crossrefs

Sequence in context: A082247 A036473 A154871 * A349065 A204335 A365888

Adjacent sequences: A206104 A206105 A206106 * A206108 A206109 A206110

Keyword

nonn

Author

R. H. Hardin, Feb 03 2012

Status

approved