login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A129286 a(n) = A129152(n) / 5^5, where A129152 is the trajectory of 5^6 under A003415, the arithmetic derivative. 6
5, 6, 11, 12, 28, 60, 152, 388, 780, 2036, 4076, 8156, 16316, 32636, 66232, 169612, 339228, 1244808, 4856004, 14568120, 56648484, 190791072, 866874960, 4084880112, 16342519392, 73816544592, 305811402048, 1732931293824, 10145637246528, 52715820454848 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,1
LINKS
FORMULA
a(n+1) = A129283(a(n)), a(0) = 5.
a(n) = A090635(n+3) / 4, i.e., the trajectory of 20 under A003415, divided by the common factor 4. - M. F. Hasler, Nov 27 2019
PROG
(Haskell)
a129286 n = a129286_list !! n
a129286_list = iterate a129283 5 -- Reinhard Zumkeller, Nov 01 2013
CROSSREFS
Sequence in context: A277095 A332482 A190895 * A334813 A083450 A136974
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Apr 07 2007
STATUS
approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 12 10:51 EDT 2024. Contains 371632 sequences. (Running on oeis4.)