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

 

Logo

Annual Appeal: Today, Nov 11 2014, is the 4th anniversary of the launch of the new OEIS web site. 70,000 sequences have been added in these four years, all edited by volunteers. Please make a donation (tax deductible in the US) to help keep the OEIS running.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A198693 3*4^n-1 1
2, 11, 47, 191, 767, 3071, 12287, 49151, 196607, 786431, 3145727, 12582911, 50331647, 201326591, 805306367, 3221225471, 12884901887, 51539607551, 206158430207, 824633720831, 3298534883327, 13194139533311, 52776558133247 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

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

Index to sequences with linear recurrences with constant coefficients, signature (5,-4).

FORMULA

a(n) = 4*a(n-1)+3. a(n) = 5*a(n-1)-4*a(n-2), n>1.

G.f. ( 2+x ) / ( (4*x-1)*(x-1) ). - R. J. Mathar, Oct 30 2011

PROG

(MAGMA) [3*4^n-1: n in [0..30]]

CROSSREFS

Cf. A024036, A097743, A114569, A156760.

Sequence in context: A106980 A089682 A211671 * A178710 A050929 A019005

Adjacent sequences:  A198690 A198691 A198692 * A198694 A198695 A198696

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Oct 29 2011

STATUS

approved

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

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

Last modified November 26 07:08 EST 2014. Contains 250020 sequences.