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 A284012 #6 Mar 20 2017 23:22:45 %S A284012 2,2,6,2,12,6,30,2,60,12,120,6,180,30,210,2,420,6,30,2,60,6,30,2,420, %T A284012 6,30,6,60,6,30,2,420,6,30,2,60,30,60,6,30,6,30,2,60,30,30,2,30,6,30, %U A284012 2,30,6,30,6,60,30,30,6,30,6,30,2,210,6,30,2,60,6,120,2,30,30,60,6,240,6,30,2,30,6 %N A284012 a(n) = A284011(A260443(n)) = A284010(A260443(A260443(n))). %F A284012 a(n) = A284011(A260443(n)) = A284010(A260443(A260443(n))). %o A284012 (Scheme) (define (A284012 n) (A284011 (A260443 n))) %Y A284012 Cf. A260443, A284010, A284011. %Y A284012 Differs from A278243 for the first time at n=18, where a(18) = 6, while A278243(18) = 60. %K A284012 nonn %O A284012 1,1 %A A284012 _Antti Karttunen_, Mar 20 2017