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 A286370 #9 May 09 2017 17:36:44 %S A286370 2,2,7,2,2,4,4,2,5,7,6,4,7,5,5,2,7,14,7,7,2,4,10,4,4,7,6,5,4,11,5,2, %T A286370 20,6,7,14,5,4,4,7,5,33,42,4,6,5,5,4,7,20,33,7,7,58,4,5,4,7,6,11,5,5, %U A286370 11,2,14,32,7,6,7,10,4,14,11,7,6,4,7,11,11,7,7,6,73,33,2,4,4,4,4,25,6,5,10,5,11,4,6,14,7,20,4,10,10,7,5,7,32,58,6,11 %N A286370 a(n) = A286369(A139391(n)). %H A286370 Antti Karttunen, <a href="/A286370/b286370.txt">Table of n, a(n) for n = 1..10000</a> %H A286370 Indranil Ghosh, <a href="/A286370/a286370.txt">Python program to generate the sequence</a> %H A286370 <a href="/index/3#3x1">Index entries for sequences related to 3x+1 (or Collatz) problem</a> %F A286370 a(n) = A286369(A139391(n)). %o A286370 (Scheme) (define (A286370 n) (A286369 (A139391 n))) %Y A286370 Cf. A139391, A286369, A286371. %K A286370 nonn %O A286370 1,1 %A A286370 _Antti Karttunen_, May 09 2017