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A143040 10^n-th number divisible by exactly two distinct primes. 0
24, 184, 2102, 26608, 322033, 3741154, 42314023, 470041447, 5153982388, 55956463466 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

REFERENCES

J.-M. De Koninck, Ces nombres qui nous fascinent, Entry 184, pp 57, Ellipses, Paris 2008.

LINKS

Table of n, a(n) for n=1..10.

FORMULA

a(n)=A007774(10^n).

CROSSREFS

Cf. A007774.

Sequence in context: A214310 A052758 A241434 * A305166 A128960 A047057

Adjacent sequences:  A143037 A143038 A143039 * A143041 A143042 A143043

KEYWORD

more,nonn

AUTHOR

Lekraj Beedassy, Jul 18 2008

EXTENSIONS

a(8)-a(10) from Donovan Johnson, Mar 26 2010

STATUS

approved

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Last modified May 8 11:51 EDT 2021. Contains 343666 sequences. (Running on oeis4.)