A234785 Number of (n+1)X(7+1) 0..3 arrays with no adjacent elements equal and with each 2X2 subblock having the number of clockwise edge increases equal to the number of counterclockwise edge increases

5085004, 3340355564, 2268967605156, 1560344155530604, 1078605317680077396, 747324517604795047044, 518342328616619031217020, 359698014444415101581399764, 249665914107637738650774896460

Offset

1,1

Comments

Column 7 of A234786

Links

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

Example

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

Crossrefs

Sequence in context: A106785 A034607 A015363 * A206136 A186624 A157844

Adjacent sequences: A234782 A234783 A234784 * A234786 A234787 A234788

Keyword

nonn

Author

R. H. Hardin, Dec 30 2013

Status

approved