login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A153967 Number of planar n X n X n binary triangular grids symmetric both under 120 degree rotation and reflection with no more than 9 ones in any 4 X 4 X 4 subtriangle. 0
1, 2, 2, 4, 7, 15, 30, 103, 229, 913, 3237, 14316, 56401, 399787, 1756484, 13874163, 97904334, 862620519, 6788122417, 96037644217, 842802659086, 13301955362056, 187438690067450, 3299373199801311, 51852238684408496, 1465485312975753622 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..25.

CROSSREFS

Sequence in context: A049904 A049906 A014265 * A052949 A014266 A032441

Adjacent sequences: A153964 A153965 A153966 * A153968 A153969 A153970

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified November 28 08:48 EST 2022. Contains 358407 sequences. (Running on oeis4.)