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A258649 Ninth arithmetic derivative of n. 3
0, 0, 0, 0, 4, 0, 0, 0, 3424, 0, 0, 0, 8592, 0, 0, 1520, 20096, 0, 0, 0, 8144, 0, 0, 0, 16304, 0, 752, 27, 20096, 0, 0, 0, 70464, 0, 0, 3424, 22288, 0, 0, 8592, 7744, 0, 0, 0, 32624, 3424, 0, 0, 65264, 0, 1520, 3120, 22288, 0, 23112, 8592, 47872, 0, 0, 0, 47872 (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) = A003415^9(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, 9):

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

CROSSREFS

Column k=9 of A258651.

Cf. A003415.

Sequence in context: A013334 A258648 A185232 * A258650 A156393 A215061

Adjacent sequences:  A258646 A258647 A258648 * A258650 A258651 A258652

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Jun 06 2015

STATUS

approved

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Last modified November 22 16:31 EST 2019. Contains 329396 sequences. (Running on oeis4.)