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A046387 Products of 5 distinct primes. 13
2310, 2730, 3570, 3990, 4290, 4830, 5610, 6006, 6090, 6270, 6510, 6630, 7410, 7590, 7770, 7854, 8610, 8778, 8970, 9030, 9282, 9570, 9690, 9870, 10010, 10230, 10374, 10626, 11130, 11310, 11730, 12090, 12210, 12390, 12558, 12810, 13090, 13110 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Subsequence of A051270. 4620 = 2^2*3*5*7*11 is in A051270 but not in here, for example. - R. J. Mathar, Nov 10 2014

LINKS

T. D. Noe, Table of n, a(n) for n = 1..10000

EXAMPLE

a(1) = 2310 = 2 * 3 * 5 * 7 * 11 = A002110(5) = 5#.

a(2) = 2730 = 2 * 3 * 5 * 7 * 13.

a(3) = 3570 = 2 * 3 * 5 * 7 * 17.

a(10) = 6006 = 2 * 3 * 7 * 11 * 13.

MATHEMATICA

f5Q[n_]:=Last/@FactorInteger[n]=={1, 1, 1, 1, 1}; lst={}; Do[If[f5Q[n], AppendTo[lst, n]], {n, 8!}]; lst (* Vladimir Joseph Stephan Orlovsky, Aug 26 2008 *)

PROG

(PARI) is(n)=factor(n)[, 2]==[1, 1, 1, 1, 1]~ \\ Charles R Greathouse IV, Sep 17 2015

CROSSREFS

Cf. A067885 (product of 6 distinct primes).

Cf. A000040, A000961, A001221, A005117, A000977, A002110, A006881, A007304, A007774, A033992, A033993, A046386.

Cf. A014614, A046403, A051270.

Sequence in context: A247839 A060231 A051270 * A136154 A258360 A076252

Adjacent sequences:  A046384 A046385 A046386 * A046388 A046389 A046390

KEYWORD

easy,nonn

AUTHOR

Patrick De Geest, Jun 15 1998

EXTENSIONS

Entry revised by N. J. A. Sloane, Apr 10 2006

STATUS

approved

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Last modified December 2 23:29 EST 2016. Contains 278694 sequences.