A221479 - OEIS

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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, 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

R. H. Hardin, Table of n, a(n) for n = 1..25

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