A186799 Number of (n+2)X4 binary arrays with no 3X3 subblock commuting with any horizontal or vertical neighbor 3X3 subblock

3984, 59907, 906615, 13730715, 207885695, 3147544633, 47657171957, 721577251158, 10925394777419, 165421364939032, 2504644302903332, 37922809664016571, 574189116011343334, 8693795217212932116

Offset

1,1

Comments

Column 2 of A186806

Links

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

Example

Some solutions for 6X4
..0..0..1..1....1..0..1..1....1..0..0..1....0..0..1..1....0..0..1..1
..1..0..0..0....1..0..0..0....0..0..0..0....0..0..0..0....1..0..0..0
..1..0..0..0....1..1..0..0....1..1..0..0....1..1..0..0....1..0..0..0
..1..1..1..1....0..1..0..1....1..0..1..1....0..1..1..1....1..1..0..1
..1..0..1..1....1..0..0..0....0..0..1..0....0..0..0..1....1..1..1..1
..1..0..0..0....0..0..1..1....1..0..0..1....0..0..1..0....1..1..0..0

Crossrefs

Sequence in context: A204493 A321053 A233648 * A203190 A229382 A159218

Adjacent sequences: A186796 A186797 A186798 * A186800 A186801 A186802

Keyword

nonn

Author

R. H. Hardin Feb 26 2011

Status

approved