The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
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!)
A220318 Equals two maps: number of n X 4 binary arrays indicating the locations of corresponding elements equal to exactly two of their king-move neighbors in a random 0..2 n X 4 array. 0
4, 89, 3167, 56819, 984087, 16290350, 264901883 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 4 of A220319.
LINKS
EXAMPLE
Some solutions for n=3
..1..0..0..0....0..0..0..1....1..1..0..0....1..0..1..0....1..0..0..1
..1..0..1..0....1..1..0..0....0..0..1..1....0..1..1..0....0..1..0..0
..0..0..1..0....0..0..0..1....1..0..1..0....0..0..1..0....0..1..1..0
CROSSREFS
Cf. A220319.
Sequence in context: A235858 A262409 A183880 * A220341 A184955 A205295
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 10 2012
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 June 18 14:56 EDT 2024. Contains 373481 sequences. (Running on oeis4.)