A185789 Number of (n+1)X(n+1) binary arrays with no 2X2 subblock sum equal to any horizontal or vertical neighbor 2X2 subblock sum

16, 96, 510, 3756, 23064, 175588, 1091308, 13289252, 94533508, 1604631196, 12332662584

Offset

1,1

Comments

Diagonal of A185798

Links

Table of n, a(n) for n=1..11.

Example

Some solutions for 3X3
..0..0..0....1..1..1....1..1..0....1..1..1....1..1..1....0..0..0....0..1..1
..1..1..0....0..0..1....1..0..1....0..0..1....0..0..1....1..1..0....0..0..1
..0..1..0....1..0..1....1..0..0....0..0..1....0..1..0....1..1..0....0..0..1

Crossrefs

Sequence in context: A100313 A091079 A321851 * A322617 A014352 A083295

Adjacent sequences: A185786 A185787 A185788 * A185790 A185791 A185792

Keyword

nonn

Author

R. H. Hardin Feb 04 2011

Status

approved