A221505 - OEIS

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A221505

Number of nX3 arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, without consecutive moves in the same direction

0, 44, 664, 12495, 221614, 4010052, 72195950, 1301644004, 23457033692, 422775316892, 7619575554956, 137327198061432, 2475032964645724, 44607285582888084, 803952693936738644, 14489560929396894421

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

Column 3 of A221507

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..20

EXAMPLE

Some solutions for n=3

..0..0..0....0..3..0....0..4..0....1..1..0....0..1..1....0..1..0....0..0..0

..2..5..1....2..1..0....1..2..0....1..2..1....1..4..1....1..3..2....0..4..2

..0..1..0....1..2..0....0..0..2....0..3..0....0..1..0....0..2..0....1..2..0