[seqfan] A179876 = k such that mu(k) - mu(k-1) = -2 ?
Paul D Hanna
pauldhanna at juno.com
Sat Sep 21 06:52:24 CEST 2013
SeqFans, Given sequence https://oeis.org/A179876 defined by:
Numbers h such that h and h-1 have same antiharmonic mean of the numbers k < h such that GCD(k, h) = 1.
2, 7, 11, 23, 47, 59, 66, 70, 78, 83, 107, 130, 167, 179, 186, 195, ...
I observed that mu(A179876(n)) - mu(A179876(n) -1) = -2 at least for all values shown in A179876.
Does the following definition generate the same sequence as A179876?
"Numbers k such that mu(k) - mu(k-1) = -2, where mu(k) = A008683(k) is the Moebius function of k."
Regards,
Paul
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