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A192016 Second arithmetic derivative of prime powers: a(n) = A068346(A000961(n)). 3
0, 0, 0, 4, 0, 0, 16, 5, 0, 0, 80, 0, 0, 0, 7, 27, 0, 0, 176, 0, 0, 0, 0, 9, 0, 0, 0, 640, 0, 0, 0, 0, 216, 0, 0, 0, 0, 0, 0, 0, 0, 13, 55, 0, 1408, 0, 0, 0, 0, 0, 0, 0, 0, 15, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 621, 0, 5120, 0, 0, 0, 0, 0, 0, 0, 19 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,4
COMMENTS
a(n) = A003415(A192015(n));
a(A000040(n)) = 0; a(A002808(n)) > 0.
LINKS
PROG
(Haskell)
a192016 = a068346 . a000961 -- Reinhard Zumkeller, Apr 16 2014
CROSSREFS
Sequence in context: A069026 A133851 A062685 * A028699 A019259 A019218
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Jun 26 2011
STATUS
approved

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Last modified March 28 05:39 EDT 2024. Contains 371235 sequences. (Running on oeis4.)