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A221479 Number of nX4 arrays of occupancy after each element moves to some horizontal or antidiagonal neighbor, without consecutive moves in the same direction 1
1, 73, 1407, 34751, 865318, 21576814, 538159483, 13422938865, 334800425933, 8350733876991, 208287552769998, 5195196692208296, 129580804689787280, 3232059523406689453, 80615402781266738787, 2010743650758352091582 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Column 4 of A221483
LINKS
EXAMPLE
Some solutions for n=3
..0..1..2..1....1..2..0..0....0..3..0..0....0..2..0..0....0..2..0..1
..1..1..2..2....1..2..3..1....1..2..2..1....1..1..1..2....1..1..2..0
..0..1..1..0....0..0..1..1....1..0..2..0....2..1..2..0....1..1..2..1
CROSSREFS
Sequence in context: A090685 A232297 A008392 * A253263 A098676 A056214
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 17 2013
STATUS
approved

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Last modified March 28 12:59 EDT 2024. Contains 371254 sequences. (Running on oeis4.)