A220918 Equals one maps: number of 3Xn binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal, diagonal and antidiagonal neighbors in a random 0..2 3Xn array

1, 38, 379, 3687, 30963, 253013, 2042071, 16390010, 131304057, 1051088784, 8410953281, 67295527293, 538391560268, 4307227357177, 34458145224515, 275666265873864, 2205333684261561, 17642679462717579, 141141451046332037

Offset

1,2

Comments

Row 3 of A220916

Links

R. H. Hardin, Table of n, a(n) for n = 1..33

Example

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

Crossrefs

Sequence in context: A240263 A156661 A249711 * A187078 A155193 A159943

Adjacent sequences: A220915 A220916 A220917 * A220919 A220920 A220921

Keyword

nonn

Author

R. H. Hardin Dec 24 2012

Status

approved