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 A072698 #7 Nov 14 2019 09:41:04 %S A072698 2,3,5,7,11,13,8,17,19,10,23,29,31,14,12,37,16,41,12,43,47,20,53,16, %T A072698 22,59,61,18,67,26,71,73,18,18,79,83,22,32,89,20,34,24,97,101,103,15, %U A072698 107,109,18,40,113,24,28,24,44,127,46,131,26,137,139,50,24,34,149,151,36 %N A072698 Sum of prime factors of A072697(n). %C A072698 a(n) = A001414(A072697(n)) = A008472(A072697(n)). %H A072698 Amiram Eldar, <a href="/A072698/b072698.txt">Table of n, a(n) for n = 1..10000</a> %e A072698 a(19) = A001414(A072697(19)) = A001414(42) = A001414(2*3*7) = 2+3+7 = 12. %Y A072698 Cf. A072699, A072700. %K A072698 nonn %O A072698 1,1 %A A072698 _Reinhard Zumkeller_, Jul 04 2002