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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A258648 Eighth arithmetic derivative of n. 3
0, 0, 0, 0, 4, 0, 0, 0, 1520, 0, 0, 0, 3424, 0, 0, 752, 8592, 0, 0, 0, 3120, 0, 0, 0, 8144, 0, 368, 27, 8592, 0, 0, 0, 20096, 0, 0, 1520, 8976, 0, 0, 3424, 2176, 0, 0, 0, 16304, 1520, 0, 0, 32624, 0, 752, 1552, 8976, 0, 10260, 3424, 22288, 0, 0, 0, 22288, 0, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

LINKS

Alois P. Heinz, Table of n, a(n) for n = 0..10000

FORMULA

a(n) = A003415^8(n).

MAPLE

d:= n-> n*add(i[2]/i[1], i=ifactors(n)[2]):

A:= proc(n, k) option remember; `if`(k=0, n, d(A(n, k-1))) end:

a:= n-> A(n, 8):

seq(a(n), n=0..70);

CROSSREFS

Column k=8 of A258651.

Cf. A003415.

Sequence in context: A258646 A258647 A013334 * A185232 A258649 A258650

Adjacent sequences:  A258645 A258646 A258647 * A258649 A258650 A258651

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Jun 06 2015

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 November 19 00:12 EST 2019. Contains 329310 sequences. (Running on oeis4.)