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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A020568 G.f.: 1/((1-5x)(1-10x)(1-12x)). 1
1, 27, 499, 7863, 113731, 1561647, 20724139, 268611543, 3422947891, 43073421567, 536871293179, 6642406690023, 81708636139651, 1000502412972687, 12206022852156619, 148472243708301303 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Harvey P. Dale, Table of n, a(n) for n = 0..900

Index entries for linear recurrences with constant coefficients, signature (27,-230,600).

FORMULA

a(0)=1, a(1)=27, a(2)=499, a(n)=27*a(n-1)-230*a(n-2)+600*a(n-3) From Harvey P. Dale, May 22 2012

a(n) = 5*5^n/7 -10*10^n +72*12^n/7. - R. J. Mathar, Jun 30 2013

MATHEMATICA

CoefficientList[Series[1/((1-5x)(1-10x)(1-12x)), {x, 0, 40}], x] (* or *) LinearRecurrence[{27, -230, 600}, {1, 27, 499}, 40] (* Harvey P. Dale, May 22 2012 *)

CROSSREFS

Sequence in context: A025956 A020724 A021994 * A021734 A019752 A001709

Adjacent sequences:  A020565 A020566 A020567 * A020569 A020570 A020571

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane.

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified September 24 21:29 EDT 2017. Contains 292441 sequences.