A221889 Number of nX5 arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor, without 2-loops or left turns

0, 169, 2722, 154458, 5408074, 216702488, 8108157774, 312478899428, 11844506207312, 452737020967585, 17231687717703318, 657222685236663008, 25040978402084210994, 954569517870158674877, 36379458343654847722008

Offset

1,2

Comments

Column 5 of A221890

Links

Table of n, a(n) for n=1..15.

Example

Some solutions for n=4
..0..0..2..3..1....1..2..2..2..1....0..3..3..1..0....0..2..2..1..0
..0..3..2..1..0....0..1..2..2..0....0..0..0..2..1....1..0..0..3..1
..0..2..1..0..0....0..2..0..1..0....0..1..1..2..1....0..2..2..3..0
..1..0..1..3..0....1..1..1..1..0....1..2..1..1..0....0..0..1..1..1

Crossrefs

Sequence in context: A231974 A183716 A012014 * A156160 A264261 A232002

Adjacent sequences: A221886 A221887 A221888 * A221890 A221891 A221892

Keyword

nonn

Author

R. H. Hardin Jan 30 2013

Status

approved