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Values of antiharmonic mean B(q) of the numbers k < q such that gcd(k, q) = 1 is integer for nonprimes q from A179887, where B(q) = A053818(q) / A023896(q) = A175505(q) / A175506(q).
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%I #10 Aug 03 2019 02:58:46

%S 1,7,15,23,31,37,39,55,57,61,63,71,73,77,79,89,95,97,111,113,119,121,

%T 125,135,137,143,145,151,153,157,165,169,173,175,177,177,183

%N Values of antiharmonic mean B(q) of the numbers k < q such that gcd(k, q) = 1 is integer for nonprimes q from A179887, where B(q) = A053818(q) / A023896(q) = A175505(q) / A175506(q).

%F a(n) = A175505(A003627(n)).

%e a(6) = 37 because for A179887(6) = 55 holds: B(55) = A053818(55)/A023896(55) = 40700/1100 = 37.

%Y Cf. A179871, A179872, A179873, A179874, A179875, A179876, A179877, A179878, A179879, A179880, A179882, A179883, A179884, A179885, A179886, A179887, A179890, A179891.

%K nonn

%O 1,2

%A _Jaroslav Krizek_, Jul 30 2010, Jul 31 2010