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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A137584 a(n) = 3*a(n-1) - 2*a(n-2) + a(n-3), n > 3. 1
0, 3, 6, 13, 30, 70, 163, 379, 881, 2048, 4761, 11068, 25730, 59815, 139053, 323259, 751486, 1746993, 4061266, 9441298, 21948355, 51023735, 118615793, 275748264, 641036941, 1490230088, 3464364646, 8053670703, 18722512905, 43524561955, 101182330758, 235220381269 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..31.

Index entries for linear recurrences with constant coefficients, signature (3, -2, 1).

FORMULA

G.f.: -x*(x^2-3*x+3)/(x^3-2*x^2+3*x-1).

MATHEMATICA

LinearRecurrence[{3, -2, 1}, {0, 3, 6, 13}, 50] (* Harvey P. Dale, Jan 28 2013 *)

CROSSREFS

Sequence in context: A108639 A087218 A098075 * A201631 A125267 A141353

Adjacent sequences:  A137581 A137582 A137583 * A137585 A137586 A137587

KEYWORD

nonn

AUTHOR

Paul Curtz, Apr 26 2008

EXTENSIONS

More terms from Harvey P. Dale, Jan 28 2013

a(4) = 30 inserted by Georg Fischer, Apr 10 2019

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 June 19 23:01 EDT 2019. Contains 324222 sequences. (Running on oeis4.)