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

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A015242 (2*n-7)*n^2. 1
0, -5, -12, -9, 16, 75, 180, 343, 576, 891, 1300, 1815, 2448, 3211, 4116, 5175, 6400, 7803, 9396, 11191, 13200, 15435, 17908, 20631, 23616, 26875, 30420, 34263, 38416, 42891, 47700, 52855, 58368, 64251 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..10000

Index to sequences with linear recurrences with constant coefficients, signature (4,-6,4,-1).

FORMULA

G.f. x*(-5+8*x+9*x^2) / (x-1)^4 . - R. J. Mathar, Oct 25 2011

PROG

(MAGMA) [(2*n-7)*n^2: n in [0..40]]; // Vincenzo Librandi, Oct 26 2011

CROSSREFS

Sequence in context: A169729 A070368 A066326 * A009415 A195031 A076537

Adjacent sequences:  A015239 A015240 A015241 * A015243 A015244 A015245

KEYWORD

sign

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 16 17:48 EST 2012. Contains 205939 sequences.