A076052 Sum(k=1, n, A006460(k)).

1, 3, 5, 9, 13, 17, 19, 20, 22, 23, 27, 28, 29, 33, 37, 39, 40, 44, 48, 50, 52, 53, 54, 56, 60, 62, 63, 64, 65, 66, 68, 72, 76, 78, 80, 81, 82, 83, 85, 89, 91, 95, 99, 101, 103, 105, 109, 113, 114, 115, 116, 120, 124, 126, 128, 130, 134, 136, 140, 142, 144, 148, 152

Offset: 1

Author

Benoit Cloitre, Oct 30 2002

Keywords

• nonn

Links

• Reinhard Zumkeller, Table of n, a(n) for n = 1..10000
• Index entries for sequences related to 3x+1 (or Collatz) problem

Programs

Haskell

a076052 n = a076052_list !! (n-1)
a076052_list = scanl1 (+) $ map a006460 [1..]
-- Reinhard Zumkeller, Nov 16 2013

Formula

a(n) seems to be asymptotic to 7/3*n