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A221506 Number of nX4 arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, without consecutive moves in the same direction 0
1, 446, 31663, 2691211, 219689604, 18054912942, 1481559445366, 121595969760961, 9979148121938539, 818972532183106546, 67211557641378928789, 5515926988608836197348 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Column 4 of A221507
LINKS
EXAMPLE
Some solutions for n=3
..1..0..1..0....0..2..2..1....0..0..1..1....1..2..0..1....0..1..0..1
..0..3..1..3....2..2..0..1....2..4..1..1....1..0..3..1....2..1..3..2
..2..0..1..0....1..0..1..0....1..0..1..0....1..2..0..0....1..1..0..0
CROSSREFS
Sequence in context: A025354 A025346 A139230 * A065576 A200071 A203960
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 18 2013
STATUS
approved

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Last modified April 13 08:31 EDT 2024. Contains 371638 sequences. (Running on oeis4.)