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A082878 Arithmetic derivative of numbers of the form p*q^k with distinct primes p and q, k>0. 0
5, 7, 16, 9, 8, 21, 24, 10, 13, 44, 15, 32, 14, 19, 12, 21, 16, 68, 48, 39, 25, 112, 45, 20, 56, 81, 1, 6, 92, 22, 31, 33, 51, 18, 72, 26, 39, 55, 80, 18, 176, 43, 22, 45, 32, 140, 20, 96, 34, 49, 24, 272, 77, 75, 1, 64, 55, 40, 240, 28, 120, 87, 61, 24, 63, 44, 128, 46, 26 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(n) = A003415(A084227(n)).

LINKS

Table of n, a(n) for n=1..69.

FORMULA

a(p*q^k) = (p+q)*q^(k-1).

CROSSREFS

Sequence in context: A116048 A120282 A132094 * A106506 A029649 A327251

Adjacent sequences:  A082875 A082876 A082877 * A082879 A082880 A082881

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, May 25 2003

STATUS

approved

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Last modified March 29 15:16 EDT 2020. Contains 333107 sequences. (Running on oeis4.)