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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
0
1, 4, 9, 12, 24, 30, 49, 58, 73
OFFSET
1,2
COMMENTS
Diagonal of A221356
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
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 12 2013
STATUS
approved