A209502 Number of nX7 0..4 arrays with every 2X2 subblock containing exactly one value repeat, and new values 0..4 introduced in row major order

855, 1920126, 5801378991, 17538444837670, 53052739133301878, 160472621147386212721, 485400266057664024464791, 1468244769479038501500597043, 4441166748603271019044231589770

Offset

1,1

Comments

Column 7 of A209503

Links

R. H. Hardin, Table of n, a(n) for n = 1..124

Example

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

Crossrefs

Sequence in context: A105275 A100969 A183998 * A198527 A234885 A251453

Adjacent sequences: A209499 A209500 A209501 * A209503 A209504 A209505

Keyword

nonn

Author

R. H. Hardin Mar 09 2012

Status

approved