A205464 Number of (n+1)X7 0..3 arrays with the number of clockwise edge increases in every 2X2 subblock differing from each horizontal or vertical neighbor

10876432, 3053150968, 1185601231024, 461355684937208, 178097908817359584, 68862365329186909360, 26629795409510135065440, 10296713802508008634192456, 3981422133075217184705209320

Offset

1,1

Comments

Column 6 of A205466

Links

Table of n, a(n) for n=1..9.

Example

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

Crossrefs

Sequence in context: A151909 A205664 A205953 * A374779 A202470 A224639

Adjacent sequences: A205461 A205462 A205463 * A205465 A205466 A205467

Keyword

nonn

Author

R. H. Hardin Jan 27 2012

Status

approved