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Numbers h such that h and h-1 have same antiharmonic mean of the numbers k < h such that gcd(k, h) = 1 and simultaneously this mean is not integer.
19

%I #9 May 02 2021 06:30:13

%S 7,66,70,78,130,186,195,211,222,238,255,310,322,331,366,399,418,438,

%T 463,474,483,498,534,547,555,571,574,582,598,615,627,663,670,682,691,

%U 714,754

%N Numbers h such that h and h-1 have same antiharmonic mean of the numbers k < h such that gcd(k, h) = 1 and simultaneously this mean is not integer.

%C Subsequence of A179876 and A179883.

%C For corresponding values of numbers h-1 see A179879. - _Jaroslav Krizek_, Jul 31 2010

%F a(n) = A179879(n) + 1. - _Jaroslav Krizek_, Jul 31 2010

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

%K nonn

%O 1,1

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