A221025 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, vertical and antidiagonal neighbors in a random 0..1 n X n array

1, 3, 7, 16, 24, 33, 45, 63, 81, 100

Offset

1,2

Comments

Diagonal of A221028

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Sequence in context: A190890 A116040 A218276 * A036666 A218359 A117491

Adjacent sequences: A221022 A221023 A221024 * A221026 A221027 A221028

Keyword

nonn

Author

R. H. Hardin Dec 29 2012

Status

approved