login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A097908 Decimal expansion of sum_{i >= 1} f(i)/g(i), where f(i) = triangular number(i) and g(i) = (sum of first i primes)^3. 0
1, 5, 8, 3, 6, 8, 8, 8, 3, 4, 7, 3, 7, 0, 8, 5, 1, 0, 8, 5 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..19.

FORMULA

Equals sum_{n>=1} A000217(n)/A007504(n)^3. - R. J. Mathar, Dec 07 2014

EXAMPLE

0.1583688...

CROSSREFS

Cf. A000217, A007504

Sequence in context: A196567 A200685 A099872 * A198612 A019907 A248007

Adjacent sequences:  A097905 A097906 A097907 * A097909 A097910 A097911

KEYWORD

cons,more,nonn

AUTHOR

Pierre CAMI, Sep 04 2004

EXTENSIONS

Corrected offset and three least significant digits R. J. Mathar, Jan 31 2009

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 January 28 04:30 EST 2022. Contains 350654 sequences. (Running on oeis4.)