A221355 Sum of neighbor maps: log base 2 of the number of n X n binary arrays indicating the locations of corresponding elements equal to the sum mod 2 of their horizontal, diagonal and antidiagonal neighbors in a random 0..1 n X n array

1, 4, 9, 12, 24, 30, 49, 58, 73

Offset

1,2

Comments

Diagonal of A221356

Links

Table of n, a(n) for n=1..9.

Example

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

Crossrefs

Sequence in context: A051233 A124623 A220195 * A197681 A197624 A339594

Adjacent sequences: A221352 A221353 A221354 * A221356 A221357 A221358

Keyword

nonn

Author

R. H. Hardin Jan 12 2013

Status

approved