The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A115959 Numbers n having exactly 5 distinct prime factors, the largest of which is greater than or equal to sqrt(n) (i.e., sqrt(n)-rough numbers with exactly 5 distinct prime factors). 6
 44310, 46830, 47670, 48090, 48930, 50190, 50610, 52710, 53970, 55230, 56490, 56910, 58170, 59010, 59430, 61530, 64470, 65310, 65730, 66570, 69510, 70770, 72870, 73290, 74130, 75390, 77070, 78330, 79590, 80430, 81690, 83370, 84210 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Robert Israel, Table of n, a(n) for n = 1..10000 EXAMPLE 46830 is in the sequence because it has 5 distinct prime factors (2, 3, 5, 7 and 223) and 223 > sqrt(46830). MAPLE with(numtheory): a:=proc(n) if nops(factorset(n))=5 and factorset(n)[5]^2>=n then n else fi end: seq(a(n), n=1..93000); CROSSREFS Cf. A115956, A115957, A115958, A115960, A115961. Sequence in context: A015388 A257714 A204668 * A045937 A138359 A178553 Adjacent sequences:  A115956 A115957 A115958 * A115960 A115961 A115962 KEYWORD nonn AUTHOR Emeric Deutsch, Feb 02 2006 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified April 18 05:11 EDT 2021. Contains 343072 sequences. (Running on oeis4.)