Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A082476
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A082476 a(n)=sum(d|n, mu(d)^2*tau(d)^2). +0
1
1, 5, 5, 5, 5, 25, 5, 5, 5, 25, 5, 25, 5, 25, 25, 5, 5, 25, 5, 25, 25, 25, 5, 25, 5, 25, 5, 25, 5, 125, 5, 5, 25, 25, 25, 25, 5, 25, 25, 25, 5, 125, 5, 25, 25, 25, 5, 25, 5, 25, 25, 25, 5, 25, 25, 25, 25, 25, 5, 125, 5, 25, 25, 5, 25, 125, 5, 25, 25, 125, 5, 25, 5, 25, 25, 25, 25, 125 (list; graph; listen)
OFFSET

1,2

COMMENT

More generally : sum(d|n, mu(d)^2*tau(d)^m)=(2^m+1)^omega(n)

FORMULA

a(n)=5^omega(n); multiplicative with a(p^e)=5

PROGRAM

(PARI) a(n)=5^omega(n)

CROSSREFS

Cf. A074816.

Sequence in context: A076407 A134701 A078097 this_sequence A024729 A046271 A046263

Adjacent sequences: A082473 A082474 A082475 this_sequence A082477 A082478 A082479

KEYWORD

mult,nonn

AUTHOR

Benoit Cloitre (benoit7848c(AT)orange.fr), Apr 27 2003

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 10 12:37 EST 2009. Contains 170569 sequences.


AT&T Labs Research