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 A097623 #5 May 06 2020 02:49:13 %S A097623 1,2,3,4,5,6,6,6,6,10,7,12,10,12,15,8,12,9,10,20,11,11,12,16,15,20,9, %T A097623 18,12,30,11,10,11,18,30,13,20,20,30,30,16,19,16,19,30,21,12,16,18,30, %U A097623 19,30,15,13,35,32,30,21,20,60,11,19,27,21,30,19,12,27,32,60,30,36,16,30 %N A097623 a(n) = A097621(A097621(A097621(n))). %C A097623 a(n) = A097622(A097621(n)) = A097621(A097622(n)). %Y A097623 Cf. A097621, A097622. %K A097623 nonn %O A097623 1,2 %A A097623 _Reinhard Zumkeller_, Aug 17 2004