Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A144765
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A144765 Partial cototient function Phi(c, n) for c = 3: number of 3-semiprimes less than or equal and not coprime to n. +0
1
0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 2, 0, 2, 1, 2, 0, 3, 0, 4, 2, 4, 0, 4, 1, 4, 3, 5, 0, 7, 0, 6, 4, 6, 3, 7, 0, 6, 4, 6, 0, 8, 0, 8, 7, 8, 0, 10, 2, 10, 6, 10, 0, 12, 5, 10, 6, 10, 0, 12, 0, 10, 8, 10, 5, 14, 0, 12, 8, 15, 0, 16, 0, 13, 12, 14, 6, 19, 0, 17, 10, 15, 0, 19, 7, 15, 10, 15, 0, 19, 6, 16 (list; graph; listen)
OFFSET

1,12

CROSSREFS

Cf. A000010, A014612, A144741

Sequence in context: A068067 A046926 A074398 this_sequence A147588 A070824 A071459

Adjacent sequences: A144762 A144763 A144764 this_sequence A144766 A144767 A144768

KEYWORD

easy,nonn

AUTHOR

Reikku Kulon (reikku(AT)gmail.com), Sep 20 2008

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 20:09 EST 2009. Contains 167514 sequences.


AT&T Labs Research