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!)
A221338 Number of nX2 arrays of occupancy after each element moves to some king-move neighbor, with no 2-loops and with no occupancy greater than 2 1
0, 13, 85, 758, 5736, 44186, 335511, 2551999, 19387680, 147314684, 1119227588, 8503470301, 64605367209, 490840923878, 3729168338072, 28332370303954, 215255161696051, 1635400433430595, 12424947349080184, 94398470191658900 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 2 of A221341

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..68

FORMULA

Empirical: a(n) = 17*a(n-1) -96*a(n-2) +174*a(n-3) +255*a(n-4) -1452*a(n-5) +1878*a(n-6) +67*a(n-7) -2335*a(n-8) +1974*a(n-9) -508*a(n-10)

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A296647 A233325 A003764 * A322720 A082036 A037060

Adjacent sequences:  A221335 A221336 A221337 * A221339 A221340 A221341

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 11 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 August 15 13:59 EDT 2022. Contains 356145 sequences. (Running on oeis4.)