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
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