login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A136299 a(n)=3a(n-1)-4a(n-3), n>3. 1
1, 2, 4, 7, 13, 23, 41, 71, 121, 199, 313, 455, 569, 455, -455, -3641, -12743, -36409, -94663, -233017, -553415, -1281593, -2912711, -6524473, -14447047, -31690297, -68972999, -149130809, -320631239, -686001721, -1461481927, -3101920825, -6561755591, -13839339065 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..33.

Index entries for linear recurrences with constant coefficients, signature (3,0,-4).

FORMULA

O.g.f.: -(-1+x+2*x^2+x^3)/[(1+x)(-1+2*x)^2]. a(n)=11*2^n/9+(-1)^n/9-A001787(n+1)/12 if n>0. - R. J. Mathar, Apr 04 2008

CROSSREFS

Cf. A051013.

Sequence in context: A114832 A239553 A319255 * A208354 A003116 A303666

Adjacent sequences:  A136296 A136297 A136298 * A136300 A136301 A136302

KEYWORD

sign,easy

AUTHOR

Paul Curtz, Mar 22 2008

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 August 13 05:41 EDT 2020. Contains 336442 sequences. (Running on oeis4.)