login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A155364 Number of ways to place zero or more nonadjacent 1,0 1,1 2,1 2,2 3,1 4,1 5,1 6,1 polyhexes in any orientation on a planar nXnXn triangular grid. 0
1, 7, 19, 37, 176, 778, 2857, 13120, 90210, 607102, 4426307, 43683350, 478373407 (list; graph; refs; listen; history; text; internal format)
OFFSET

6,2

LINKS

Table of n, a(n) for n=6..18.

EXAMPLE

Maximal 10 X 10 X 10 example

............0

...........1.0

..........0.1.0

.........0.0.1.0

........0.1.0.1.0

.......0.1.0.0.1.1

......0.1.0.0.1.1.0

.....0.1.0.0.0.0.0.1

....1.1.0.1.1.1.1.1.1

...0.1.1.0.0.0.0.0.1.0

CROSSREFS

Sequence in context: A155318 A155280 A155365 * A155332 A155388 A155367

Adjacent sequences:  A155361 A155362 A155363 * A155365 A155366 A155367

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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified November 17 05:27 EST 2019. Contains 329217 sequences. (Running on oeis4.)