A220578 Equals one maps: number of nX7 binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal and antidiagonal neighbors in a random 0..1 nX7 array

64, 5240, 436288, 33180533, 2449921734, 178051989526, 12835487766480

Offset

1,1

Comments

Column 7 of A220579

Links

Table of n, a(n) for n=1..7.

Example

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

Crossrefs

Sequence in context: A302964 A302807 A303468 * A067821 A283491 A300471

Adjacent sequences: A220575 A220576 A220577 * A220579 A220580 A220581

Keyword

nonn

Author

R. H. Hardin Dec 16 2012

Status

approved