A221065 Sum of neighbor maps: number of n X n binary arrays indicating the locations of corresponding elements equal to the sum mod 4 of their king-move neighbors in a random 0..3 n X n array

2, 8, 512, 65536, 17530176, 68719476736, 562949953421312

Offset

1,1

Comments

Diagonal of A221072

Links

Table of n, a(n) for n=1..7.

Example

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

Crossrefs

Sequence in context: A000890 A033542 A098870 * A023365 A262826 A013554

Adjacent sequences: A221062 A221063 A221064 * A221066 A221067 A221068

Keyword

nonn

Author

R. H. Hardin Dec 31 2012

Status

approved