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 A178170 #6 Mar 30 2012 17:22:56 %S A178170 1,2,4,8,16,5,32,10,3,6,20,64,12,40,21,24,128,13,42,80,48,26,256,84, %T A178170 160,52,96,85,17,168,53,512,104,320,192,34,170,106,11,336,208,68,1024, %U A178170 384,22,35,640,340,212,7,69,136,44,672,416,70,14,341,213,113,768,2048,1280 %N A178170 The product of the numbers in the Collatz trajectory of a(n) is the n-th largest such product. %C A178170 That is, a(n) is the number k such that A178168(k) = A178169(n). %C A178170 The sequence is easy to compute by generating the Collatz tree while keeping track of the products at the leaves of the tree. At each step, extend the tree at the leaf having the smallest product. %H A178170 T. D. Noe, <a href="/A178170/b178170.txt">Table of n, a(n) for n=1..1000</a> %K A178170 nonn %O A178170 1,2 %A A178170 _T. D. Noe_, May 21 2010