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A220244 Equals two maps: number of nX3 binary arrays indicating the locations of corresponding elements equal to exactly two of their king-move neighbors in a random 0..1 nX3 array 0
2, 18, 143, 816, 4467, 27192, 158296, 915920, 5443662, 31825008, 185788218, 1094039664, 6406886173, 37509117127, 220173740293, 1290097909772, 7558886967916, 44324041325721 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 3 of A220247
LINKS
EXAMPLE
Some solutions for n=3
..0..0..0....0..1..0....1..0..0....0..1..0....0..0..0....0..1..0....1..0..0
..0..0..0....1..1..0....0..0..0....1..0..0....0..0..0....1..0..0....0..0..1
..0..1..0....0..0..1....0..0..0....0..0..1....0..0..0....0..0..0....0..0..0
CROSSREFS
Sequence in context: A216584 A193446 A226733 * A001804 A277182 A052640
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 08 2012
STATUS
approved

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Last modified March 1 22:23 EST 2024. Contains 370443 sequences. (Running on oeis4.)