Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A008889
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A008889 Aliquot sequence starting at 150. +0
4
150, 222, 234, 312, 528, 960, 2088, 3762, 5598, 6570, 10746, 13254, 13830, 19434, 20886, 21606, 25098, 26742, 26754, 40446, 63234, 77406, 110754, 171486, 253458, 295740, 647748, 1077612, 1467588 (list; graph; listen)
OFFSET

0,1

REFERENCES

R. K. Guy, Unsolved Problems in Number Theory, B6.

LINKS

Christophe CLAVIER, Aliquot Sequences

FORMULA

a(n)=A008888(n+1). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 28 2008]

MAPLE

f := proc(n) option remember; if n = 0 then 150; else sigma(f(n-1))-f(n-1); fi; end:

CROSSREFS

Sequence in context: A048706 A054729 A116185 this_sequence A063829 A140671 A054558

Adjacent sequences: A008886 A008887 A008888 this_sequence A008890 A008891 A008892

KEYWORD

nonn

AUTHOR

N. J. A. Sloane (njas(AT)research.att.com).

page 1

Search completed in 0.002 seconds

Lookup | Welcome | Find friends | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
More pages | Superseeker | Maintained by N. J. A. Sloane (njas@research.att.com)

Last modified December 20 16:54 EST 2009. Contains 171081 sequences.


AT&T Labs Research