A186823 Half the number of (n+2)X9 binary arrays with each 3X3 subblock having sum 4 or 5

1750896, 56422648, 1653336285, 52016332522, 1783799078413, 60308324623150, 2065963672906699, 72230087740874585

Offset

1,1

Comments

Column 7 of A186825

Links

Table of n, a(n) for n=1..8.

Example

Some solutions for 4X9 with a(1,1)=0
..0..0..1..1..0..1..0..0..1....0..0..1..0..0..1..0..0..0
..0..0..1..0..0..1..0..1..0....0..0..1..0..1..1..1..1..1
..0..1..1..0..1..0..1..1..1....0..1..1..0..0..1..0..0..1
..0..0..1..1..0..1..0..0..0....0..1..0..0..1..0..0..0..1

Crossrefs

Sequence in context: A244073 A237307 A090054 * A095391 A234456 A251981

Adjacent sequences: A186820 A186821 A186822 * A186824 A186825 A186826

Keyword

nonn

Author

R. H. Hardin Feb 27 2011

Status

approved