A181221 Number of nX5 binary matrices with no three 1's adjacent in a line horizontally, vertically, diagonally or antidiagonally

24, 576, 6475, 97764, 1495392, 21513936, 316896477, 4672517426, 68571093673, 1008146803248, 14823077688569, 217869625616208, 3202690847200999, 47079980407589036, 692062815855417554, 10173239318638447266

Offset

1,1

Comments

Column 5 of A181224

Links

R. H. Hardin, Table of n, a(n) for n=1..225

Example

Some avoided solutions for 3X5
..0..1..0..0..0....0..1..0..0..0....0..0..0..0..0....0..0..0..0..1
..0..0..1..0..0....0..1..0..0..0....0..0..0..0..0....0..0..0..1..0
..1..0..0..1..0....0..1..0..1..0....1..1..1..1..0....1..0..1..0..0

Crossrefs

Sequence in context: A292282 A206933 A206868 * A188563 A207085 A207179

Adjacent sequences: A181218 A181219 A181220 * A181222 A181223 A181224

Keyword

nonn

Author

R. H. Hardin Oct 10 2010

Status

approved