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A228024 Antiharmonic mean of the divisors of A228023(n) (the n-th primitive antiharmonic number). 5

%I

%S 1,13,35,85,119,185,255,313,455,481,425,455,629,841,845,741,1183,841,

%T 1355,1015,1547,1105,1445,2197,1799,2735,3315,2405,3523,2873,2755,

%U 3605,4165,4595,4607,5705,5525,5365,7111,7995,5915,7157,6165,8285,5525,9373,10933,11305,7813

%N Antiharmonic mean of the divisors of A228023(n) (the n-th primitive antiharmonic number).

%C A228023 is the main entry for this sequence.

%H Charles R Greathouse IV, <a href="/A228024/b228024.txt">Table of n, a(n) for n = 1..10000</a>

%F a(n) = sigma_2(A228023(n))/sigma(A228023(n)).

%Y Cf. A228023, A227986, A176797.

%K nonn

%O 1,2

%A _Charles R Greathouse IV_ and _Jonathan Sondow_, Aug 03 2013

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Last modified May 19 18:35 EDT 2022. Contains 353847 sequences. (Running on oeis4.)