A221107 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 and antidiagonal neighbors in a random 0..1 n X n array

1, 4, 7, 14, 24, 34, 47, 62, 77, 100, 118, 144, 165

Offset

1,2

Comments

Diagonal of A221108

Links

Table of n, a(n) for n=1..13.

Example

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

Crossrefs

Sequence in context: A048241 A003404 A139025 * A128610 A305124 A094968

Adjacent sequences: A221104 A221105 A221106 * A221108 A221109 A221110

Keyword

nonn

Author

R. H. Hardin Jan 02 2013

Status

approved