A221631 Equals one maps: number of nX4 binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal, diagonal and antidiagonal neighbors in a random 0..3 nX4 array

8, 176, 3848, 64828, 1047216, 16774800, 268431156, 4294959928, 68719464306, 1099511606852, 17592186009096, 281474976650752, 4503599627268410, 72057594037753300, 1152921504606547488, 18446744073709037416

Offset

1,1

Comments

Column 4 of A221632

Links

R. H. Hardin, Table of n, a(n) for n = 1..37

Example

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

Crossrefs

Sequence in context: A220966 A220544 A220749 * A064342 A251578 A099175

Adjacent sequences: A221628 A221629 A221630 * A221632 A221633 A221634

Keyword

nonn

Author

R. H. Hardin Jan 21 2013

Status

approved