Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A078701
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A078701 Least odd prime factor of n, or 1 if no such factor exists. +0
11
1, 1, 3, 1, 5, 3, 7, 1, 3, 5, 11, 3, 13, 7, 3, 1, 17, 3, 19, 5, 3, 11, 23, 3, 5, 13, 3, 7, 29, 3, 31, 1, 3, 17, 5, 3, 37, 19, 3, 5, 41, 3, 43, 11, 3, 23, 47, 3, 7, 5, 3, 13, 53, 3, 5, 7, 3, 29, 59, 3, 61, 31, 3, 1, 5, 3, 67, 17, 3, 5, 71, 3, 73, 37, 3, 19, 7, 3, 79, 5, 3, 41, 83, 3, 5, 43, 3, 11 (list; graph; listen)
OFFSET

1,3

COMMENT

a(n) = A020639(A000265(n));

a(n) = A020639(n) iff n is odd; a(2^k) = 1.

A000265, A020639, A005408, A000079.

CROSSREFS

Sequence in context: A099550 A099549 A082725 this_sequence A161398 A161820 A116528

Adjacent sequences: A078698 A078699 A078700 this_sequence A078702 A078703 A078704

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Dec 18 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 November 25 08:46 EST 2009. Contains 167481 sequences.


AT&T Labs Research