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!)
A155268 Number of ways to place zero or more nonadjacent 1,1 2,1 3,0 3,1 3,2 3,3 polyhexes in any orientation on a planar nXnXn triangular grid. 0
1, 7, 19, 43, 106, 668, 7101, 59172, 470802, 4838017, 83647134, 1916327385, 46633700220, 1291488803553, 46130099469946 (list; graph; refs; listen; history; text; internal format)
OFFSET
3,2
COMMENTS
Same series for 1,1 2,1 2,2 3,0 3,1 3,3 polyhexes.
Same series for 0,0 1,0 1,1 2,0 2,2 3,0 polyhexes.
LINKS
EXAMPLE
Maximal 12 X 12 X 12 example
..............1
.............0.1
............1.1.1
...........0.0.0.1
..........0.0.0.0.0
.........1.0.0.0.0.1
........0.1.0.0.0.0.1
.......1.1.1.1.0.1.1.1
......0.0.0.0.0.0.0.0.1
.....1.0.1.1.1.1.0.1.0.0
....0.1.0.0.1.0.0.0.1.0.0
...1.1.1.1.0.1.0.1.1.1.1.0
CROSSREFS
Sequence in context: A155303 A268801 A155275 * A124700 A155336 A155427
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 22 2009
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 20 20:50 EDT 2024. Contains 374459 sequences. (Running on oeis4.)