A186043 Number of (n+2)X(n+2) binary arrays with each 3X3 subblock singular

338, 21466, 4071834, 1926378146, 2795398080908, 11449128594687024, 127786000491037137748

Offset

1,1

Comments

Diagonal of A186052

Links

Table of n, a(n) for n=1..7.

Example

Some solutions for 4X4
..0..1..1..1....1..1..0..1....0..0..0..1....0..1..1..0....1..0..0..1
..1..0..0..0....0..0..0..0....1..0..1..0....0..0..0..0....0..0..0..0
..0..1..1..0....1..0..0..0....1..0..0..0....0..1..0..1....1..1..1..1
..0..0..0..1....1..0..0..0....0..0..1..1....1..1..0..0....0..0..0..0

Crossrefs

Sequence in context: A059976 A232782 A035750 * A107546 A235880 A158000

Adjacent sequences: A186040 A186041 A186042 * A186044 A186045 A186046

Keyword

nonn

Author

R. H. Hardin Feb 11 2011

Status

approved