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A221477 Number of n X n arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, without consecutive moves in the same direction 0
0, 4, 50, 34751, 48514602, 1224264741193, 144288378372479004 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Diagonal of A221483
LINKS
EXAMPLE
Some solutions for n=3
..0..2..0....0..2..1....0..3..0....0..2..1....1..2..0....0..3..0....0..3..1
..1..2..2....1..1..1....2..1..1....1..2..1....1..1..1....1..1..2....1..0..1
..0..2..0....0..3..0....0..2..0....0..2..0....0..3..0....0..2..0....0..3..0
CROSSREFS
Sequence in context: A231832 A193157 A235604 * A122464 A226375 A347551
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 17 2013
STATUS
approved

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Last modified March 29 02:23 EDT 2024. Contains 371264 sequences. (Running on oeis4.)