A220804 Sum of neighbor maps: number of n X 5 binary arrays indicating the locations of corresponding elements equal to the sum mod 4 of their horizontal and vertical neighbors in a random 0..3 n X 5 array.

24, 928, 30766, 1048576, 33358976, 1073741824, 34348186888, 1099436130304

Offset

1,1

Links

Table of n, a(n) for n=1..8.

Example

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

Crossrefs

Column 5 of A220805.

Sequence in context: A390903 A001784 A172206 * A220253 A262583 A001866

Adjacent sequences: A220801 A220802 A220803 * A220805 A220806 A220807

Keyword

nonn,more

Author

R. H. Hardin, Dec 21 2012

Status

approved