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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A174333 61*n^2. 1
0, 61, 244, 549, 976, 1525, 2196, 2989, 3904, 4941, 6100, 7381, 8784, 10309, 11956, 13725, 15616, 17629, 19764, 22021, 24400, 26901, 29524, 32269, 35136, 38125, 41236, 44469, 47824, 51301, 54900, 58621, 62464, 66429, 70516, 74725, 79056 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..1000

Index entries for linear recurrences with constant coefficients, signature (3,-3,1).

FORMULA

a(n) = (31*n)^2-(30*n)^2.

a(n) = 3*a(n-1) -3*a(n-2) +a(n-3). - Vincenzo Librandi, Jul 12 2012

G.f.: 61*x*(1+x)/(1-x)^3. - Vincenzo Librandi, Jul 12 2012

MATHEMATICA

Table[61*n^2, {n, 0, 50}] (* Vincenzo Librandi, Jul 12 2012 *)

PROG

(MAGMA) [61*n^2: n in [0..50]];

(PARI) a(n)=61*n^2 \\ Charles R Greathouse IV, Jun 17 2017

CROSSREFS

Sequence in context: A034863 A251312 A158673 * A158680 A152413 A029815

Adjacent sequences:  A174330 A174331 A174332 * A174334 A174335 A174336

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Mar 16 2010

EXTENSIONS

Definition clarified by R. J. Mathar, Jul 06 2010

Comment rewritten as formula by Bruno Berselli, Jul 12 2012

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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified November 19 03:44 EST 2019. Contains 329310 sequences. (Running on oeis4.)