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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A021829 Expansion of 1/((1-x)(1-4x)(1-6x)(1-10x)). 1
1, 21, 297, 3577, 39753, 422793, 4384969, 44813769, 454009545, 4575676105, 45971643081, 461011315401, 4617904831177, 46225887853257, 462540273695433, 4627092539587273, 46281069938293449, 462871589543951049 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..200

FORMULA

a(n) = (5*10^(n+3) - 27*6^(n+3) + 30*4^(n+3) - 8)/1080. [Yahia Kahloune, Jun 26 2013]

MATHEMATICA

CoefficientList[Series[1 / ((1 - x) (1 - 4 x) (1 - 6 x) (1 - 10 x)), {x, 0, 20}], x] (* Vincenzo Librandi, Jul 11 2013 *)

CROSSREFS

Sequence in context: A025940 A041844 A295779 * A019943 A021634 A295049

Adjacent sequences:  A021826 A021827 A021828 * A021830 A021831 A021832

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
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified February 16 08:26 EST 2019. Contains 320159 sequences. (Running on oeis4.)