

A072072


Least number initiating a chain of n consecutive numbers each of which has maximal prime exponent exactly 3.


0




OFFSET

1,1


COMMENTS

a(7) <= 30199064929748 ("=" if there are no bugs in my program), a(8) > 300000000000000 (unless there's a bug in my program).  Brad Chalfan (bradc(AT)hevanet.com), Nov 13 2002


LINKS

Table of n, a(n) for n=1..7.


EXAMPLE

m = 2068373 = 17*17*17*421,
m+1 = 2068374 = 2*3*7*11*11*11,
m+2 = 2068375 = 5*5*5*37*16547,
m+3 = 2068376 = 2*2*2*47*5501.


CROSSREFS

Cf. A071318A071320, A071125.
Sequence in context: A229237 A291699 A292914 * A195614 A131927 A132869
Adjacent sequences: A072069 A072070 A072071 * A072073 A072074 A072075


KEYWORD

more,nonn


AUTHOR

Labos Elemer, Jun 13 2002


EXTENSIONS

One more term from Don Reble, Jun 17 2002
a(6) <= 80566783622 from Don Reble, equality established by Brad Chalfan (bradc(AT)hevanet.com), Nov 13 2002
30199064929748 confirmed to be the 7th term by Donovan Johnson, Jun 15 2009


STATUS

approved



