A187962 Half the number of (n+2)X9 binary arrays with no 3X3 subblock having a sum equal to any horizontal or vertical neighbor 3X3 subblock sum

7626496, 86157696, 860108472, 7359939574, 98476432408

Offset

1,1

Comments

Column 7 of A187964

Links

Table of n, a(n) for n=1..5.

Example

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

Crossrefs

Sequence in context: A237156 A233605 A204803 * A080340 A192105 A233597

Adjacent sequences: A187959 A187960 A187961 * A187963 A187964 A187965

Keyword

nonn

Author

R. H. Hardin Mar 16 2011

Status

approved