login
This site is supported by donations to The OEIS Foundation.
Logo

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A067291 Numbers n such that prime(n)>n*tau(n) where tau(n) is the number of divisors of n. 0
1, 5, 7, 11, 13, 17, 19, 23, 25, 29, 31, 33, 34, 35, 37, 38, 39, 41, 43, 46, 47, 49, 51, 53, 55, 57, 58, 59, 61, 62, 65, 67, 69, 71, 73, 74, 77, 79, 81, 82, 83, 85, 86, 87, 89, 91, 93, 94, 95, 97, 101, 103, 106, 107, 109, 111, 113, 115, 118, 119, 121, 122, 123, 125, 127 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

COMMENTS

(PARI) : for(n=1,161, if(prime(n)>n*numdiv(n),print1(n,",")))

CROSSREFS

Cf. A000005.

Sequence in context: A101550 A136801 A106571 * A007310 A069040 A070191

Adjacent sequences:  A067288 A067289 A067290 * A067292 A067293 A067294

KEYWORD

nonn

AUTHOR

Benoit Cloitre (benoit7848c(AT)orange.fr), Feb 24 2002

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 16 15:27 EST 2012. Contains 205930 sequences.