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 A076052 #8 Nov 17 2013 04:07:40 %S A076052 1,3,5,9,13,17,19,20,22,23,27,28,29,33,37,39,40,44,48,50,52,53,54,56, %T A076052 60,62,63,64,65,66,68,72,76,78,80,81,82,83,85,89,91,95,99,101,103,105, %U A076052 109,113,114,115,116,120,124,126,128,130,134,136,140,142,144,148,152 %N A076052 Sum(k=1, n, A006460(k)). %H A076052 Reinhard Zumkeller, <a href="/A076052/b076052.txt">Table of n, a(n) for n = 1..10000</a> %H A076052 <a href="/index/3#3x1"> Index entries for sequences related to 3x+1 (or Collatz) problem</a> %F A076052 a(n) seems to be asymptotic to 7/3*n %o A076052 (Haskell) %o A076052 a076052 n = a076052_list !! (n-1) %o A076052 a076052_list = scanl1 (+) $ map a006460 [1..] %o A076052 -- _Reinhard Zumkeller_, Nov 16 2013 %K A076052 nonn %O A076052 1,2 %A A076052 _Benoit Cloitre_, Oct 30 2002