A186797 Number of (n+2)X(n+2) binary arrays with no 3X3 subblock commuting with any horizontal or vertical neighbor 3X3 subblock

512, 59907, 26628581, 44618824642, 281222068231208, 6674101867860962707

Offset

1,1

Comments

Diagonal of A186806

Links

Table of n, a(n) for n=1..6.

Example

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

Crossrefs

Sequence in context: A250567 A035753 A107549 * A183815 A013701 A187461

Adjacent sequences: A186794 A186795 A186796 * A186798 A186799 A186800

Keyword

nonn

Author

R. H. Hardin Feb 26 2011

Status

approved