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!)
A153933 Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 4 ones in any 4 X 4 X 4 subtriangle. 0
1, 2, 4, 13, 26, 135, 581, 5081, 33999, 455470, 5028919, 110445068, 1936072745, 69174531647, 1977766145879, 114385090415133, 5299105178883837, 494911099658091565, 37117101455488584937 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..18.

CROSSREFS

Sequence in context: A189583 A153936 A027301 * A128601 A034500 A261455

Adjacent sequences:  A153930 A153931 A153932 * A153934 A153935 A153936

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.)