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A221803
Number of nX4 arrays of occupancy after each element moves to some king-move neighbor, without 2-loops or left turns
0
0, 378, 27692, 2341962, 197382906, 16607042116, 1396934985595, 117495706868182, 9880812782673851
OFFSET
1,2
COMMENTS
Column 4 of A221804
EXAMPLE
Some solutions for n=3
..0..1..2..0....1..1..0..0....1..0..0..0....0..2..0..0....0..4..1..0
..0..2..1..1....3..0..0..3....2..3..2..0....1..2..2..0....1..1..1..0
..1..2..1..1....0..2..1..1....1..1..1..1....1..2..1..1....1..1..2..0
CROSSREFS
Sequence in context: A325848 A248915 A225839 * A289347 A171115 A328552
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 26 2013
STATUS
approved