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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, 602751821279 (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
FORMULA
a(n)=A007774(10^n).
CROSSREFS
Cf. A007774.
Sequence in context: A214310 A052758 A241434 * A305166 A128960 A047057
KEYWORD
nonn,more
AUTHOR
Lekraj Beedassy, Jul 18 2008
EXTENSIONS
a(8)-a(10) from Donovan Johnson, Mar 26 2010
a(11) from Max Alekseyev, Mar 17 2023
STATUS
approved

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Last modified March 29 04:59 EDT 2024. Contains 371264 sequences. (Running on oeis4.)