|
| |
|
|
A046387
|
|
Products of 5 distinct primes.
|
|
12
|
|
|
|
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
|
| |
|
|
