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!)
A154048 Number of planar triangular n X n X n nonnegative integer grids symmetric both under 120 degree rotation and reflection with every similarly oriented 4 X 4 X 4 subtriangle summing to 5. 0
2, 6, 3, 5, 1, 6, 1, 4, 1, 2, 1, 4, 1, 2, 1, 4, 1, 2, 1, 4, 1, 2, 1, 4, 1, 2, 1, 4, 1, 2, 1, 4, 1, 2, 1, 4, 1, 2, 1, 4, 1, 2, 1, 4, 1, 2, 1, 4, 1, 2, 1, 4, 1, 2, 1, 4, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET
4,1
COMMENTS
Pattern 1 4 1 2 starts at n=10 and continues through at least n=60.
LINKS
EXAMPLE
Maximal zeros solution for n=10
...........1
..........1.1
.........0.0.0
........0.1.1.0
.......1.0.1.0.1
......1.1.0.0.1.1
.....0.0.0.2.0.0.0
....0.1.1.0.0.1.1.0
...1.0.1.0.1.0.1.0.1
..1.1.0.0.1.1.0.0.1.1
CROSSREFS
Sequence in context: A282061 A258252 A351496 * A259018 A353649 A084355
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 04 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 13 02:50 EDT 2024. Contains 374265 sequences. (Running on oeis4.)