A221027 Sum of neighbor maps: log base 2 of the number of nX7 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 nX7 array

7, 13, 19, 27, 35, 42, 45, 53, 62, 69, 72, 83, 90, 95, 101, 112, 119, 125, 131, 139, 147, 154, 154, 168, 175, 181, 187, 195, 203, 210, 213

Offset

1,1

Comments

Column 7 of A221028

Links

Table of n, a(n) for n=1..31.

Example

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

Crossrefs

Sequence in context: A039281 A045115 A331830 * A211431 A379479 A299928

Adjacent sequences: A221024 A221025 A221026 * A221028 A221029 A221030

Keyword

nonn

Author

R. H. Hardin Dec 29 2012

Status

approved