A183844 Number of (n+1) X 9 binary arrays with each element of every 2 X 2 subblock being the sum mod 2 of two others.

16771, 748937, 32887826, 1514840541, 68813532021, 3170254841114, 145160761315615, 6677571801577027, 306435724460478058, 14085188244943032759, 646828687624576311193, 29721310285135340886450

Offset

1,1

Comments

Column 8 of A183845.

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

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

Crossrefs

Cf. A183845.

Sequence in context: A128383 A052190 A068784 * A034820 A053074 A115923

Adjacent sequences: A183841 A183842 A183843 * A183845 A183846 A183847

Keyword

nonn

Author

R. H. Hardin, Jan 07 2011

Status

approved