Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A078551
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A078551 Largest prime dividing sigma[2,n]. +0
1
5, 5, 7, 13, 5, 5, 17, 13, 13, 61, 7, 17, 5, 13, 31, 29, 13, 181, 13, 5, 61, 53, 17, 31, 17, 41, 7, 421, 13, 37, 13, 61, 29, 13, 13, 137, 181, 17, 17, 29, 5, 37, 61, 13, 53, 17, 31, 43, 31, 29, 17, 281, 41, 61, 17, 181, 421, 1741, 13, 1861, 37, 13, 127, 17, 61, 449, 29, 53 (list; graph; listen)
OFFSET

1,1

FORMULA

a(n)=A006530[A001157(n)]

CROSSREFS

Cf. A006530, A001157-A001160, A071190.

Adjacent sequences: A078548 A078549 A078550 this_sequence A078552 A078553 A078554

Sequence in context: A097996 A033300 A134130 this_sequence A093307 A141392 A088047

KEYWORD

nonn

AUTHOR

Labos E. (labos(AT)ana.sote.hu), Dec 05 2002

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 October 5 16:50 EDT 2008. Contains 144613 sequences.


AT&T Labs Research