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

 

Logo

Annual Appeal: Please make a donation (tax deductible in USA) to keep the OEIS running. Over 5000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A153912 Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with no more than 2 ones in any 3 X 3 X 3 subtriangle. 0
1, 2, 28586, 195384, 2093119, 20428045, 317866834, 4492197059, 100898111116, 2073132268053, 67489432729042, 2005814360075163, 94662265499676795, 4075394325398277635, 278524123602639198495, 17377022786797473216927 (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: A131558 A133857 A232869 * A247790 A233460 A047076

Adjacent sequences:  A153909 A153910 A153911 * A153913 A153914 A153915

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified December 10 13:38 EST 2016. Contains 279004 sequences.