A183696 Number of (n+1) X 8 0..2 arrays with every 2 X 2 subblock nonsingular.

3054290, 2981428242, 2852069116186, 2745624826054514, 2637896539171553758, 2535999716660879680590, 2437545227670570289677842, 2343065856411597861794635150, 2252200900355775045091097714938

Offset

1,1

Comments

Column 7 of A183698.

Links

R. H. Hardin, Table of n, a(n) for n = 1..59

Example

Some solutions for 3 X 8
..0..1..0..2..0..2..0..2....0..2..0..2..0..2..0..1....0..2..0..2..0..1..0..2
..1..0..2..0..2..0..1..1....1..0..2..0..2..0..2..2....2..0..2..0..2..0..1..2
..0..2..0..1..1..2..0..2....0..2..0..1..1..2..2..0....0..1..0..2..1..1..1..0

Crossrefs

Cf. A183698.

Sequence in context: A205932 A281447 A246249 * A104963 A190462 A282746

Adjacent sequences: A183693 A183694 A183695 * A183697 A183698 A183699

Keyword

nonn

Author

R. H. Hardin Jan 06 2011

Status

approved