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A072072 Least number initiating a chain of n consecutive numbers each of which has maximal prime exponent exactly 3. 0
8, 135, 6858, 2068373, 133799496, 80566783622, 30199064929748 (list; graph; refs; listen; history; text; internal format)
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. A071318-A071320, 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

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Last modified December 16 06:18 EST 2019. Contains 330016 sequences. (Running on oeis4.)