The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A077328 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing all changes.

A077328

Smallest number beginning with 3 and having exactly n distinct prime divisors.
(history; published version)

#5 by N. J. A. Sloane at Thu Dec 05 19:55:51 EST 2013

AUTHOR

_Amarnath Murthy (amarnath_murthy(AT)yahoo.com), _, Nov 04 2002

Discussion

Thu Dec 05

19:55

OEIS Server: https://oeis.org/edit/global/2075

#4 by Russ Cox at Fri Mar 30 17:29:00 EDT 2012

EXTENSIONS

Correct a(3)=30 and add a(5)-a(10) from _Ray Chandler (rayjchandler(AT)sbcglobal.net), _, Apr 17 2005

More terms from _Ray Chandler (rayjchandler(AT)sbcglobal.net), _, May 02 2005

Discussion

Fri Mar 30

17:29

OEIS Server: https://oeis.org/edit/global/154

#3 by N. J. A. Sloane at Fri Jan 12 03:00:00 EST 2007

KEYWORD

base,nonn,new

EXTENSIONS

Correct a(3)=30 and add a(5)-a(10) from Ray Chandler (RayChandlerrayjchandler(AT)alumni.tcusbcglobal.edunet), Apr 17 2005

More terms from Ray Chandler (RayChandlerrayjchandler(AT)alumni.tcusbcglobal.edunet), May 02 2005

#2 by N. J. A. Sloane at Tue Jul 19 03:00:00 EDT 2005

NAME

Smallest number beginning with 3 and having exactly n distinct prime divisors, or 0 if no such number exists.

DATA

3, 33, 306, 30, 330, 3570, 30030, 3008460, 30120090, 300690390, 30043474230, 304075581810, 30035662366710, 304250263527210, 30078810535603830, 3001252188252588270, 32589158477190044730, 3003056284355533696290

CROSSREFS

Cf. A106411-A106419, A106421-A106429.

KEYWORD

base,hard,more,nonn,new

base,nonn

EXTENSIONS

Correct a(3)=30 and add a(5)-a(10) from Ray Chandler (RayChandler(AT)alumni.tcu.edu), Apr 17 2005

More terms from Ray Chandler (RayChandler(AT)alumni.tcu.edu), May 02 2005

#1 by N. J. A. Sloane at Fri May 16 03:00:00 EDT 2003

NAME

Smallest number beginning with 3 and having exactly n prime divisors, or 0 if no such number exists.

DATA

3, 33, 306, 330

OFFSET

1,1

EXAMPLE

a(1) = 3, a(6) = 30030 = 2*3*5*7*11*13.

CROSSREFS

Cf. A077326, A077327, A077329, A077330, A077331, A077332, A077333, A077334.

KEYWORD

base,hard,more,nonn

AUTHOR

Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Nov 04 2002

STATUS

approved