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!)
A064197 a(n) = 27*(n-1)*(n-2)*(n-3)*(3*n-8)/2. 1
0, 0, 324, 2268, 8100, 21060, 45360, 86184, 149688, 243000, 374220, 552420, 787644, 1090908, 1474200, 1950480, 2533680, 3238704, 4081428, 5078700, 6248340, 7609140, 9180864, 10984248, 13041000, 15373800, 18006300, 20963124 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,3

REFERENCES

L. Berzolari, Allgemeine Theorie der Höheren Ebenen Algebraischen Kurven, Encyclopädie der Mathematischen Wissenschaften mit Einschluss ihrer Anwendungen. Band III_2. Heft 3, Leipzig: B. G. Teubner, 1906. p. 341.

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 2..1000

FORMULA

G.f.: 324*x^4*(1+2*x)/(1-x)^5. - Colin Barker, Feb 28 2012

MATHEMATICA

Table[27*(n-1)*(n-2)*(n-3)*(3*n-8)/2, {n, 2, 40}] (* Vincenzo Librandi, Feb 29 2012 *)

PROG

(MAGMA) [27*(n-1)*(n-2)*(n-3)*(3*n-8)/2: n in [2..30]]; // Vincenzo Librandi, Feb 29 2012

CROSSREFS

Sequence in context: A305070 A229538 A250437 * A233639 A203374 A183358

Adjacent sequences:  A064194 A064195 A064196 * A064198 A064199 A064200

KEYWORD

nonn,easy

AUTHOR

Antreas P. Hatzipolakis (xpolakis(AT)otenet.gr), Sep 22 2001

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 August 11 12:12 EDT 2022. Contains 356065 sequences. (Running on oeis4.)