login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A139787 Semiprime lucky numbers. 2
9, 15, 21, 25, 33, 49, 51, 69, 87, 93, 111, 115, 129, 133, 141, 159, 169, 201, 205, 219, 235, 237, 259, 267, 289, 303, 319, 321, 327, 339, 361, 391, 393, 415, 427, 451, 489, 511, 517, 519, 529, 535, 537, 553, 559, 579, 583, 591, 655, 679, 685, 699, 717 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Subset of A031879 Composite lucky numbers.

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..10000

FORMULA

A000959 INTERSECTION A001358.

CROSSREFS

Cf. A000959, A001358, A031879.

Sequence in context: A025045 A107987 A031879 * A225461 A172181 A063139

Adjacent sequences:  A139784 A139785 A139786 * A139788 A139789 A139790

KEYWORD

easy,nonn

AUTHOR

Jonathan Vos Post, May 20 2008

EXTENSIONS

Term 135 deleted by Giovanni Resta, Jun 20 2016

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 17 15:15 EDT 2021. Contains 348049 sequences. (Running on oeis4.)