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 A256103 #12 Dec 24 2018 08:49:19 %S A256103 5,7,11,11,13,17,19,23,29,31,43,37,41,43,47,53,59,61,67,71,73,79,83, %T A256103 89,97,11,101,103,107,109,113,127,131,137,139,149,151,157,163,167,173, %U A256103 179,181,191,193,197,199,211,223 %N A256103 a(n) = gcd(A001008(m(n)), m(n)), with m(n) = A256102(n), n >= 1. %C A256103 See A256102. The entry a(n) gives the quotient of the numerator of the harmonic sum of the first A256102(n) positive integers and the denominator of the harmonic mean of the same numbers. For each positive integer values m not from A256102 this quotient is 1. %F A256103 a(n) = gcd(A001008(m(n)), m(n)), with m(n) = A256102(n), n >= 1. %F A256103 a(n) = A001008(m(n))/A175441(m(n)), with m(n) = A256103(n), n >= 1. %e A256103 n = 1: gcd(A001008(20), 20) = gcd(55835135, 20) = 5. A001008(20)/A175441(20) = 55835135/11167027 = 5. %e A256103 Because 19 is not from A256102 one has A001008(19) = A175441(19) = 275295799. %Y A256103 Cf. A256102, A002805, A001008, A175441. %K A256103 nonn,easy %O A256103 1,1 %A A256103 _Wolfdieter Lang_, Apr 16 2015