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!)
A089285 Sum of divisors of floor(pi*10^n), pi=3.14... 3
4, 32, 474, 4550, 38688, 314160, 5890500, 47154384, 627314688, 4227938208, 44474529792, 471238898040, 3384209127992, 31609375538016, 321468276096000, 3397292023738536, 63981878014882800, 314159266666564480 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

a(n)=A000203(A011545(n)).

LINKS

Table of n, a(n) for n=0..17.

EXAMPLE

n=4: floor(pi*10^4)=31415 with divisors:

{1,5,61,103,305,515,6283,31415}: a(4)=1+5+61+103+305+515+6283+31415=38688.

CROSSREFS

Cf. A089284, A089286, A089287, A000796.

Sequence in context: A192500 A192486 A037964 * A209197 A086906 A034663

Adjacent sequences:  A089282 A089283 A089284 * A089286 A089287 A089288

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Oct 30 2003

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 October 28 21:20 EDT 2020. Contains 338064 sequences. (Running on oeis4.)