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A221486
Number of 4Xn arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, without consecutive moves in the same direction
1
0, 64, 313, 34751, 802711, 37622097, 1219698562, 47497298437, 1684060316110, 62602762212310, 2271866000217269, 83456368590958988, 3046870056535199883, 111585285541376641494, 4080105459850623520340, 149308509670479309110705
OFFSET
1,2
COMMENTS
Row 4 of A221483
LINKS
EXAMPLE
Some solutions for n=3
..1..2..0....0..2..0....0..3..0....1..1..1....0..2..0....0..3..0....0..1..0
..0..3..1....1..2..1....2..1..0....0..2..0....1..3..1....1..2..1....2..3..0
..1..1..1....0..3..1....0..2..2....1..2..1....1..1..1....1..1..0....0..2..1
..0..2..0....0..1..1....0..2..0....0..3..0....0..2..0....0..2..1....0..2..1
CROSSREFS
Sequence in context: A299947 A372093 A251196 * A231942 A221686 A211258
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 17 2013
STATUS
approved