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A138206
a(n) is the first term in a chain of at least n consecutive numbers each with exactly 6 distinct prime factors.
6
30030, 11243154, 323567034, 7933641735, 45212320502, 626804494291, 7563009743844
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OFFSET
1,1
COMMENTS
a(8) > 10^13. [
Donovan Johnson
, Jan 15 2009]
LINKS
Table of n, a(n) for n=1..7.
Roger B. Eggleton and James A. MacDougall,
Consecutive integers with equally many principal divisors
, Math. Mag. 81 (2008), 235-248. [
T. D. Noe
, Oct 13 2008]
CROSSREFS
Cf.
A087977
,
A087978
,
A138207
.
Cf.
A154573
. [
Donovan Johnson
, Jan 15 2009]
Sequence in context:
A072940
A147573
A046324
*
A031853
A066576
A104877
Adjacent sequences:
A138203
A138204
A138205
*
A138207
A138208
A138209
KEYWORD
nonn
,
more
AUTHOR
Donovan Johnson
, Mar 06 2008
EXTENSIONS
a(6)-a(7) from
Donovan Johnson
, Jan 15 2009
STATUS
approved
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Last modified March 19 01:34 EDT 2024. Contains 370952 sequences. (Running on oeis4.)