A220252 Sum of neighbor maps: number of nX4 binary arrays indicating the locations of corresponding elements equal to the sum mod 3 of their king-move neighbors in a random 0..2 nX4 array.

16, 256, 4096, 45792, 1048576, 16777216, 268435456, 4294967296, 68476059648, 1099511627776, 17592186044416, 281474976710656, 4503599627370496, 72056280260730880, 1152921504606846976, 18446744073709551616

Offset: 1

Author

R. H. Hardin Dec 08 2012

Keywords

• nonn

Comments

Column 4 of A220254

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210