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 A304739 #6 May 19 2018 12:38:49
%S A304739 0,1,2,3,2,4,4,3,4,3,5,5,5,4,6,5,4,5,6,5,7,6,6,6,7,6,7,6,8,6,5,8,7,9,
%T A304739 7,9,8,10,7,6,7,10,9,11,6,7,8,7,7,8,8,7,8,9,8,11,10,12,8,12,11,13,7,6,
%U A304739 9,13,12,14,8,9,10,7,14,13,15,8,8,9,8,15,14,16,8,10,11,8,11,16,15,17,7,9,10,9,10,9,9,8,17,16,18,11,9,8,12
%N A304739 a(n) = A056239(A064413(n)).
%C A304739 For visualizing of the EKG-sequence, A064413.
%H A304739 Antti Karttunen, <a href="/A304739/b304739.txt">Table of n, a(n) for n = 1..65539</a>
%H A304739 <a href="/index/Ed#EKG">Index entries for sequences related to EKG sequence</a>
%F A304739 a(n) = A056239(A064413(n)).
%o A304739 (PARI)
%o A304739 A056239(n) = { my(f); if(1==n, 0, f=factor(n); sum(i=1, #f~, f[i,2] * primepi(f[i,1]))); }
%o A304739 A304739(n) = A056239(A064413(n)); \\ Needs also code for A064413.
%Y A304739 Cf. A056239, A064413, A304735.
%K A304739 nonn
%O A304739 1,3
%A A304739 _Antti Karttunen_, May 19 2018