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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A153923 Number of planar n X n X n binary triangular grids symmetric under 120 degree rotation with no more than 3 ones in any 4 X 4 X 4 subtriangle. 0
1, 2, 723, 3847, 12686, 64066, 522788, 2375205, 17429033, 207659953, 1416380562, 15388271829, 267002004687, 2673537774503, 42803194029689, 1082510269366192 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..15.

CROSSREFS

Sequence in context: A028367 A000197 A036298 * A167440 A156008 A103169

Adjacent sequences:  A153920 A153921 A153922 * A153924 A153925 A153926

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 03 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 June 25 04:06 EDT 2019. Contains 324345 sequences. (Running on oeis4.)