A220327 Equals two maps: number of nX6 binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and antidiagonal neighbors in a random 0..1 nX6 array

12, 658, 29467, 1335202, 59893608, 2680626797, 119808040854, 5350328821481

Offset

1,1

Comments

Column 6 of A220328

Links

Table of n, a(n) for n=1..8.

Example

Some solutions for n=3
..0..0..1..0..1..0....0..0..0..1..1..0....0..0..0..1..0..1....0..0..0..1..1..0
..1..1..1..1..0..0....0..1..0..0..1..0....0..0..0..1..1..1....1..0..1..1..0..1
..0..1..0..1..0..0....1..1..1..0..1..0....1..0..0..0..1..0....0..1..1..0..1..0

Crossrefs

Sequence in context: A071307 A195574 A195554 * A281780 A295870 A177322

Adjacent sequences: A220324 A220325 A220326 * A220328 A220329 A220330

Keyword

nonn

Author

R. H. Hardin Dec 10 2012

Status

approved