A186015 1/8192 the number of (n+2) X 7 0..3 arrays with no 3 X 3 subblock trace equal to any horizontal or vertical neighbor 3 X 3 subblock trace.

294396948, 1574001377834, 8896022678225044, 50262815203472669902, 283178106619218127407323, 1595416034937751138022369826, 8989089860728323984726287971908, 50647264481612304867053099566842986

Offset

1,1

Comments

Column 5 of A186019.

Links

R. H. Hardin, Table of n, a(n) for n = 1..26

Example

Some solutions for 4 X 7
..2..0..2..2..1..0..2....2..0..2..0..1..0..3....2..0..2..3..1..0..3
..0..0..0..0..1..2..1....0..0..0..0..0..1..3....0..0..0..0..2..2..1
..0..0..0..0..0..2..0....0..0..0..0..0..1..1....0..0..0..0..0..2..0
..0..0..0..1..0..2..1....0..0..0..1..0..2..0....0..0..0..1..0..2..0

Crossrefs

Cf. A186019.

Sequence in context: A112452 A291459 A034640 * A183800 A289908 A182990

Adjacent sequences: A186012 A186013 A186014 * A186016 A186017 A186018

Keyword

nonn

Author

R. H. Hardin, Feb 10 2011

Status

approved