A220175 Sum of neighbor maps: number of nX4 binary arrays indicating the locations of corresponding elements equal to the sum mod 3 of their horizontal, vertical and antidiagonal neighbors in a random 0..2 nX4 array

16, 256, 4096, 65536, 1048576, 16777216, 268435456, 4294967296, 68701991383

Offset

1,1

Comments

Column 4 of A220177

a(n)=16^n for n<=8 but not for n=9

Links

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

Example

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

Crossrefs

Sequence in context: A267976 A220803 A229101 * A001025 A144318 A230142

Adjacent sequences: A220172 A220173 A220174 * A220176 A220177 A220178

Keyword

nonn

Author

R. H. Hardin Dec 06 2012

Status

approved