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!)
A061144 Sum of the areas of triangles whose vertices lie on the n X n grid with unit spacing as enumerated in A045996. 1
0, 2, 70, 764, 4718, 20658, 71616, 209752, 540416, 1259050, 2704494, 5433420, 10320054, 18688026, 32478032, 54460064, 88495536, 139857842, 215617062, 325102172, 480442174, 697204602, 995133456, 1399002496, 1939589056 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
Nathaniel Johnston, C program for computing terms
EXAMPLE
a(2)=4*(1/2)=2 and a(3)=32*(1/2)+32*(1)+4*(3/2)+8*(2)=70.
CROSSREFS
Cf. A045996.
Sequence in context: A085915 A285217 A259317 * A132566 A151686 A201555
KEYWORD
nonn
AUTHOR
Zachary Franco, Apr 15 2001
EXTENSIONS
a(14)-a(25) and corrected offset from Nathaniel Johnston, Apr 29 2011
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 21 00:14 EDT 2024. Contains 372720 sequences. (Running on oeis4.)