This site is supported by donations to The OEIS Foundation.

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A144312 5*n*(5*n+1)/2. 5
 0, 15, 55, 120, 210, 325, 465, 630, 820, 1035, 1275, 1540, 1830, 2145, 2485, 2850, 3240, 3655, 4095, 4560, 5050, 5565, 6105, 6670, 7260, 7875, 8515, 9180, 9870, 10585, 11325, 12090, 12880, 13695, 14535, 15400, 16290, 17205, 18145, 19110, 20100 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS a(n) = A000217(5*n). LINKS Index entries for linear recurrences with constant coefficients, signature (3,-3,1). FORMULA a(n)=a(n-1)+25*n-10 (with a(0)=0). - Vincenzo Librandi, Nov 25 2010 PROG (PARI) a(n)=5*n*(5*n+1)/2 \\ Charles R Greathouse IV, Jun 17 2017 CROSSREFS Sequence in context: A043972 A226196 A179741 * A062025 A211797 A172436 Adjacent sequences:  A144309 A144310 A144311 * A144313 A144314 A144315 KEYWORD nonn,easy AUTHOR Reinhard Zumkeller, Sep 17 2008 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.

Last modified January 17 23:15 EST 2019. Contains 319251 sequences. (Running on oeis4.)