A204053 Number of (n+2)X7 0..3 arrays with every 3X3 subblock having equal diagonal elements or equal antidiagonal elements, and new values 0..3 introduced in row major order

4823759, 45689226, 315429190, 2336174650, 18962117027, 135508809479, 1017086083917, 7592417722506, 56889349938986, 423304805355442, 3129226285383207, 23392351131337319, 174669286581663845

Offset

1,1

Comments

Column 5 of A204056

Links

R. H. Hardin, Table of n, a(n) for n = 1..29

Example

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

Crossrefs

Sequence in context: A017635 A203655 A248587 * A176772 A017538 A190583

Adjacent sequences: A204050 A204051 A204052 * A204054 A204055 A204056

Keyword

nonn

Author

R. H. Hardin Jan 09 2012

Status

approved