login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A010120 Smallest start for a '3x+1' sequence containing 2^n. 11
1, 2, 3, 3, 3, 21, 21, 75, 75, 151, 151, 1365, 1365, 5461, 5461, 14563, 14563, 87381, 87381, 184111, 184111, 932067, 932067, 5592405, 5592405, 13256071, 13256071, 26512143, 26512143, 357913941, 357913941, 1431655765, 1431655765, 3817748707 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..33.

Index entries for sequences related to 3x+1 (or Collatz) problem

FORMULA

a(n) = A070167(A000079(n)). - Reinhard Zumkeller, Jan 02 2013

PROG

(Haskell)

a010120 = a070167 . a000079  -- Reinhard Zumkeller, Jan 02 2013

CROSSREFS

Cf. A054646.

Sequence in context: A022296 A013069 A096393 * A012887 A177876 A079633

Adjacent sequences:  A010117 A010118 A010119 * A010121 A010122 A010123

KEYWORD

nonn,nice

AUTHOR

Greg Warrington (waringtn(AT)netcom.com)

EXTENSIONS

Corrected and extended by David W. Wilson, Jun 15 1997

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 31 03:48 EDT 2020. Contains 333136 sequences. (Running on oeis4.)