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!)
A155287 Number of ways to place zero or more nonadjacent 0,0 1,0 2,0 3,1 3,2 3,3 polyhexes in any orientation on a planar nXnXn triangular grid. 0
1, 4, 10, 22, 40, 147, 972, 6099, 33889, 206340, 1814635, 22696011, 314005946, 4605664055, 78764798797, 1720340418305, 47411742873448 (list; graph; refs; listen; history; text; internal format)
OFFSET
3,2
COMMENTS
Same series for 0,0 1,0 2,0 2,1 3,1 3,2 3,3 polyhexes.
LINKS
EXAMPLE
Maximal 12 X 12 X 12 example
..............1
.............0.1
............0.0.1
...........1.1.1.0
..........0.0.0.0.1
.........1.1.0.0.1.0
........1.0.1.0.1.0.0
.......1.0.0.1.0.1.1.1
......0.0.0.0.0.0.0.0.0
.....1.1.0.1.0.0.1.0.1.1
....1.0.1.0.1.0.1.0.1.0.1
...1.0.0.1.0.1.1.0.1.0.0.1
CROSSREFS
Sequence in context: A155404 A155360 A155382 * A155337 A155402 A155232
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 June 19 02:16 EDT 2024. Contains 373492 sequences. (Running on oeis4.)