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!)
A200561 Expansion of -2*x / ( (2*x-1)*(4*x^2+3*x+1) ). 0
2, -2, 6, 6, -10, 70, -42, 102, 374, -506, 2070, -90, 182, 16198, -16554, 50406, 46070, -77690, 573078, -359898, 884534, 2980294, -4090410, 17127270, -1465738, 2996998, 131089686, -136821594, 422976950, 352097350, -600716202, 4688726502, -3073380106, 7645103494, 23717948310, -33014782170, 141611506742 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..37.

Index entries for linear recurrences with constant coefficients, signature (-1,2,8).

FORMULA

a(n) = -a(n-1) +2*a(n-2) +8*a(n-3).

7*a(n) = 2^(n+1) -2*(-1)^n*(2*A049072(n-1)+A049072(n)). - R. J. Mathar, Dec 01 2011

CROSSREFS

Sequence in context: A007040 A032139 A032043 * A241380 A028476 A179478

Adjacent sequences:  A200558 A200559 A200560 * A200562 A200563 A200564

KEYWORD

sign,easy

AUTHOR

Krishnamurthy Balasubraniam, Nov 19 2011

EXTENSIONS

Definition from R. J. Mathar, Nov 19 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 4 07:32 EDT 2020. Contains 333213 sequences. (Running on oeis4.)