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!)
A153957 Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 7 ones in any 5 X 5 X 5 subtriangle. 0
1, 2, 4, 16, 56, 256, 1518, 15896, 171565, 3217779, 58858443, 1927799742, 63170771231, 3671078892600, 213376157401433, 21677971544137049 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
CROSSREFS
Sequence in context: A005388 A053503 A308381 * A068789 A009624 A009161
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 May 26 21:09 EDT 2024. Contains 372844 sequences. (Running on oeis4.)