|
Search: id:A115960
|
|
|
| A115960 |
|
Numbers n having exactly 6 distinct prime factors, the largest of which is greater than or equal to sqrt(n) (i.e. sqrt(n)-rough numbers with exactly 6 distinct prime factors). |
|
+0
6
|
|
| 5338410, 5389230, 5403090, 5407710, 5421570, 5430810, 5444670, 5477010, 5490870, 5500110, 5504730, 5518590, 5527830, 5541690, 5569410, 5583270, 5597130, 5629470, 5638710, 5652570, 5680290, 5698770, 5712630, 5721870
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
EXAMPLE
|
5389230 is in the sequence because it has 6 distinct prime factors (2, 3, 5, 7, 11, and 2333) and 2333>sqrt(5389230).
|
|
MAPLE
|
with(numtheory): a:=proc(n) if nops(factorset(n))=6 and factorset(n)[6]^2>=n then n else fi end: seq(a(n), n=(2*3*5*7*11)^2..5850000);
|
|
CROSSREFS
|
Cf. A115956, A115957, A115958, A115959, A115961.
Sequence in context: A116105 A116128 A058252 this_sequence A022258 A092020 A029822
Adjacent sequences: A115957 A115958 A115959 this_sequence A115961 A115962 A115963
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Emeric Deutsch (deutsch(AT)duke.poly.edu), Feb 02 2006
|
|
|
Search completed in 0.002 seconds
|
