The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
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!)
A031176 Periods of sum of squares of digits iterated until the sequence becomes periodic. 18
1, 1, 8, 8, 8, 8, 8, 1, 8, 8, 1, 8, 8, 1, 8, 8, 8, 8, 8, 1, 8, 8, 8, 1, 8, 8, 8, 8, 1, 8, 8, 1, 1, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 8, 8, 8, 8, 1, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 8, 1, 8, 8, 8, 8, 8, 8, 8, 8, 1, 8, 8, 1, 8, 8, 8, 1, 8, 8, 8, 8, 1, 8, 8, 1, 8, 8, 1, 8, 8 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
LINKS
Eric Weisstein's World of Mathematics, Digit addition.
CROSSREFS
Cf. A003132, A099645. [From R. J. Mathar, May 31 2009]
Sequence in context: A010531 A195141 A171811 * A269350 A195139 A010731
KEYWORD
nonn,base
AUTHOR
EXTENSIONS
The value a(0)=1 was added by R. J. Mathar, May 31 2009
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 June 17 15:57 EDT 2024. Contains 373463 sequences. (Running on oeis4.)