login
This site is supported by donations 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. 17
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

Table of n, a(n) for n=0..99.

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

Adjacent sequences:  A031173 A031174 A031175 * A031177 A031178 A031179

KEYWORD

nonn,base

AUTHOR

Eric W. Weisstein

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 | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified August 28 10:17 EDT 2016. Contains 275928 sequences.