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 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

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