Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A116000
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A116000 phi(n) + sigma(n) gives a semiprime (A001358). +0
2
2, 3, 4, 5, 6, 7, 10, 11, 13, 16, 17, 19, 22, 23, 25, 27, 29, 31, 37, 40, 41, 43, 46, 47, 52, 53, 58, 59, 61, 64, 67, 68, 71, 72, 73, 79, 80, 82, 83, 89, 97, 98, 101, 103, 106, 107, 109, 113, 117, 127, 128, 131, 136, 137, 139, 144, 149, 151, 157, 162, 163, 166, 167 (list; graph; listen)
OFFSET

1,1

EXAMPLE

phi(101)+sigma(101)=202=2*101.

CROSSREFS

Cf. A001358, A116016, A116001.

Sequence in context: A131616 A064295 A001751 this_sequence A050725 A080571 A082400

Adjacent sequences: A115997 A115998 A115999 this_sequence A116001 A116002 A116003

KEYWORD

nonn

AUTHOR

Giovanni Resta (g.resta(AT)iit.cnr.it), Feb 13 2006

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 November 18 20:14 EST 2008. Contains 147244 sequences.


AT&T Labs Research