A187959 Half the number of (n+2)X6 binary arrays with no 3X3 subblock having a sum equal to any horizontal or vertical neighbor 3X3 subblock sum

42592, 322128, 2292560, 15189800, 124421880, 993918272, 7359939574, 57445906202, 440377678798, 3253135013018, 25486986699010, 197366974577896, 1485391626845718, 11512660838008050, 88561258735158018, 669899830762918568

Offset

1,1

Comments

Column 4 of A187964

Links

R. H. Hardin, Table of n, a(n) for n = 1..21

Example

Some solutions for 4X6 with a(1,1)=0
..0..0..0..0..0..0....0..1..0..0..0..0....0..1..0..0..0..1....0..1..1..1..1..1
..0..0..1..1..0..0....0..0..0..1..0..1....0..1..1..1..0..0....0..0..1..1..1..0
..0..1..0..0..0..0....0..1..0..1..0..1....0..0..0..0..0..1....0..0..1..0..0..0
..0..1..0..1..0..0....1..0..1..1..0..0....0..1..1..0..0..0....0..0..1..1..0..0

Crossrefs

Sequence in context: A062694 A210264 A251245 * A253521 A254419 A254426

Adjacent sequences: A187956 A187957 A187958 * A187960 A187961 A187962

Keyword

nonn

Author

R. H. Hardin Mar 16 2011

Status

approved