login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A153934 Number of planar n X n X n binary triangular grids symmetric both under 120 degree rotation and reflection with no more than 4 ones in any 4 X 4 X 4 subtriangle. 0
1, 2, 2, 3, 4, 7, 9, 37, 44, 122, 360, 837, 1955, 11063, 21562, 102402, 455597, 1800255, 6701316, 61868659, 193623470, 1467251281, 10855933316, 68253791333, 417351118269, 6197640479557, 31389717866283, 387573069042758 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..27.

CROSSREFS

Sequence in context: A323357 A322299 A003179 * A143590 A336030 A245620

Adjacent sequences:  A153931 A153932 A153933 * A153935 A153936 A153937

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 21 15:37 EDT 2021. Contains 345364 sequences. (Running on oeis4.)