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!)
A112773 3 together with primes multiplied by 3. 3
3, 6, 9, 15, 21, 33, 39, 51, 57, 69, 87, 93, 111, 123, 129, 141, 159, 177, 183, 201, 213, 219, 237, 249, 267, 291, 303, 309, 321, 327, 339, 381, 393, 411, 417, 447, 453, 471, 489, 501, 519, 537, 543, 573, 579, 591, 597, 633, 669, 681, 687, 699, 717, 723, 753 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

3 times the noncomposite numbers (see formula). Also column 2 of A272400. - Omar E. Pol, Apr 29 2016

LINKS

G. C. Greubel, Table of n, a(n) for n = 1..1000

FORMULA

a(n) = 3*A008578(n). - Omar E. Pol, Jan 31 2012

MATHEMATICA

Insert[Table[3Prime[n], {n, 1, 60}], 3, 1] (* Stefan Steinerberger, Mar 30 2006 *)

CROSSREFS

Essentially the same as A001748.

Cf. A000040, A001747, A008578, A008585, A046315.

Sequence in context: A031940 A007187 A082004 * A070885 A002597 A287554

Adjacent sequences:  A112770 A112771 A112772 * A112774 A112775 A112776

KEYWORD

easy,nonn

AUTHOR

Jonathan Vos Post and Ray Chandler, Oct 15 2005

EXTENSIONS

Edited by N. J. A. Sloane, Apr 28 2008 at the suggestion of Alexander R. Povolotsky

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 January 26 20:42 EST 2020. Contains 331288 sequences. (Running on oeis4.)