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 A179883 #10 May 25 2025 01:40:23 %S A179883 1,2,6,7,10,11,22,23,46,47,58,59,65,66,69,70,77,78,82,83,106,107,129, %T A179883 130,166,167,178,179,185,186,194,195,210,211,221,222,226,227,237,238, %U A179883 254,255,262,263,265,266,309,310,321,322,330,331,346,347,358,359,365 %N A179883 List of twin numbers (h, h+1) such that h and h+1 have same antiharmonic mean of the numbers k < h such that gcd(k, h) = 1. %C A179883 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). Union of A179875 and A179876. %F A179883 a(2*n-1) = A179875(n), a(2*n) = A179876(n) = A179875(n)+1. - _Amiram Eldar_, May 24 2025 %Y A179883 Cf. A179871, A179872, A179873, A179874, A179875, A179876, A179877, A179878, A179879, A179880, A179882, A179884, A179885, A179886, A179887, A179890, A179891. %K A179883 nonn %O A179883 1,2 %A A179883 _Jaroslav Krizek_, Jul 30 2010, Jul 31 2010