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A221354
Number of 4 X n arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, without 2-loops.
0
0, 38, 6893, 938070, 103485930, 11446121074, 1234879060395, 133129213688286
OFFSET
1,2
COMMENTS
Row 4 of A221351.
EXAMPLE
Some solutions for n=3
..0..1..0....0..3..0....1..2..0....0..0..0....0..3..1....1..1..0....1..2..1
..1..2..1....0..0..1....1..2..0....2..4..0....0..2..1....1..1..0....0..4..1
..1..2..0....0..4..2....1..1..0....1..1..0....0..2..1....1..4..1....0..2..0
..1..3..0....1..1..0....1..3..0....1..3..0....1..1..0....0..2..0....0..0..1
CROSSREFS
Cf. A221351.
Sequence in context: A282962 A229523 A173133 * A096558 A355589 A145120
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 11 2013
STATUS
approved