This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A179875 #13 Mar 06 2021 06:24:12 %S A179875 1,6,10,22,46,58,65,69,77,82,106,129,166,178,185,194,210,221,226,237, %T A179875 254,262,265,309,321,330,346,358,365,382,398,417,437,454,462,466,469, %U A179875 473,478,482,493,497,502 %N A179875 Numbers h such that h and h+1 have same antiharmonic mean of the numbers k < h such that gcd(k, h) = 1. %C A179875 Corresponding values of numbers h+1 see A179876. %C A179875 Numbers h such that A175505(h) = A175505(h+1). %C A179875 numbers h such that A175506(h) = A175506(h+1). %C A179875 Antiharmonic mean B(h) of numbers k such that gcd(k, h) = 1 for numbers h >= 1 and k < h = A053818(n) / A023896(n) = A175505(h) / A175506(h). %C A179875 Conjecture: also numbers k such that mu(k) = 1 and mu(k+1) = -1, where mu is the Möbius function (tested on the first 10^4 terms). - _Amiram Eldar_, Mar 06 2021 %H A179875 Amiram Eldar, <a href="/A179875/b179875.txt">Table of n, a(n) for n = 1..10000</a> %e A179875 For n=3: a(3) = 10; B(10) = A175505(10) / A175506(10) = 7, B(11) = A175505(11) / A175506(11) = 7. %Y A179875 Cf. A179871, A179872, A179873, A179874, A179876, A179877, A179878, A179879, A179880, A179882, A179883, A179884, A179885, A179886, A179887, A179890, A179891. %K A179875 nonn %O A179875 1,2 %A A179875 _Jaroslav Krizek_, Jul 30 2010, Jul 31 2010