login
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
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
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
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 24 2012
STATUS
approved