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 A053627 #3 Mar 30 2012 18:51:20 %S A053627 1,2,3,4,5,3,7,8,9,10,11,6,13,14,5,16,17,9,19,8,21,22,23,12,25,26,27, %T A053627 7,29,10,31,32,33,34,20,18,37,38,39,16,41,12,43,44,9,46,47,24,49,50, %U A053627 51,52,53,27,55,14,57,58,59,20,61,62,28,64,65,11,67,68,69,40,71,16,73,74 %N A053627 Smallest integer which is the harmonic mean of n and an integer. %C A053627 if a(n)<>n then n is in A005279 %e A053627 a(6)=3 because 3 is the harmonic mean of 6 and 2 and neither 2 nor 1 are the harmonic means of 6 and an integer %Y A053627 Cf. A005279. %K A053627 nonn %O A053627 1,2 %A A053627 _Henry Bottomley_, Mar 20 2000