A185797 Number of (n+1) X 9 binary arrays with no 2 X 2 subblock sum equal to any horizontal or vertical neighbor 2 X 2 subblock sum.

11220, 20864, 47776, 164576, 433296, 1379208, 3629540, 13289252, 35756268, 128976744, 346446144, 1333284060, 3588481008, 13880081488, 37224984364, 148837476180, 398218723908, 1607711747604, 4285914451420, 17630641010960

Offset

1,1

Comments

Column 8 of A185798.

Links

R. H. Hardin, Table of n, a(n) for n = 1..138

Example

Some solutions for 3 X 9
..0..0..0..0..0..1..1..0..1....0..1..1..1..0..1..1..0..0
..1..1..0..0..1..1..1..0..0....0..1..0..0..0..1..1..0..1
..1..0..1..0..1..1..0..0..0....0..0..1..0..0..0..0..0..1

Crossrefs

Cf. A185798.

Sequence in context: A359871 A362446 A271582 * A256355 A135015 A104316

Adjacent sequences: A185794 A185795 A185796 * A185798 A185799 A185800

Keyword

nonn

Author

R. H. Hardin, Feb 04 2011

Status

approved