A143040 10^n-th number divisible by exactly two distinct primes.

24, 184, 2102, 26608, 322033, 3741154, 42314023, 470041447, 5153982388, 55956463466, 602751821279

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..11.

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

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