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!)
A199031 a(n) = 2*12^n-1. 1
1, 23, 287, 3455, 41471, 497663, 5971967, 71663615, 859963391, 10319560703, 123834728447, 1486016741375, 17832200896511, 213986410758143, 2567836929097727, 30814043149172735, 369768517790072831, 4437222213480873983 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
FORMULA
a(n) = 12*a(n-1)+11.
a(n) = 13*a(n-1)-12*a(n-2).
G.f.: (1+10*x)/((1-x)*(1-12*x)). - Bruno Berselli, Nov 03 2011
MATHEMATICA
LinearRecurrence[{13, -12}, {1, 23}, 40] (* Harvey P. Dale, Feb 21 2013 *)
PROG
(Magma) [2*12^n-1: n in [0..20]];
CROSSREFS
Sequence in context: A010975 A022588 A268992 * A125435 A086943 A131273
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Nov 03 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 March 4 02:53 EST 2024. Contains 370522 sequences. (Running on oeis4.)