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!)
A192443 Number of nXnXn triangular binary arrays with every 1 adjacent to exactly 3 other 1s 0
1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 4, 13, 35, 87, 286, 908, 4080, 23994, 186034, 1891698 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,10
LINKS
EXAMPLE
Some solutions for 12X12X12
.............0........................0........................0
............0.0......................0.0......................0.0
...........0.0.0....................0.0.0....................0.0.0
..........1.1.1.1..................1.1.1.1..................0.0.0.0
.........1.1.0.1.1................1.1.0.1.1................0.0.0.0.0
........1.0.0.0.0.1..............1.0.0.0.0.1..............0.1.1.1.1.0
.......1.1.1.1.0.1.1............1.1.0.0.0.1.1............0.1.1.0.1.1.0
......1.0.0.1.1.0.1.0..........1.0.1.1.0.0.1.0..........0.1.0.0.0.0.1.0
.....1.1.0.0.0.1.1.0.0........1.1.0.1.1.1.1.0.0........0.1.1.0.0.0.1.1.0
....0.1.0.0.0.0.1.0.0.0......0.1.0.0.0.0.1.0.0.0......0.0.1.0.0.0.0.1.0.0
...0.0.1.1.0.1.1.0.0.0.0....0.0.1.1.0.1.1.0.0.0.0....0.0.0.1.1.0.1.1.0.0.0
..0.0.0.1.1.1.1.0.0.0.0.0..0.0.0.1.1.1.1.0.0.0.0.0..0.0.0.0.1.1.1.1.0.0.0.0
CROSSREFS
Sequence in context: A148233 A148234 A284335 * A189590 A189597 A148235
KEYWORD
nonn
AUTHOR
R. H. Hardin Jul 01 2011
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 May 16 03:59 EDT 2024. Contains 372549 sequences. (Running on oeis4.)