login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A221774 Number of nX2 arrays of occupancy after each element stays put or moves to some king-move neighbor, without move-in move-out left turns 1
3, 35, 372, 3943, 41745, 441877, 4677106, 49504700, 523978608, 5546002679, 58701126836, 621316327261, 6576261708350, 69605796705162, 736735724582441, 7797906979453335, 82536181204107988, 873596110577329432 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A221776

LINKS

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

FORMULA

Empirical: a(n) = 19*a(n-1) -117*a(n-2) +338*a(n-3) -469*a(n-4) +191*a(n-5) +237*a(n-6) -183*a(n-7) -64*a(n-8) +14*a(n-9)

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A260586 A089933 A086043 * A221687 A221223 A006767

Adjacent sequences:  A221771 A221772 A221773 * A221775 A221776 A221777

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 25 2013

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 6 06:13 EDT 2022. Contains 355108 sequences. (Running on oeis4.)