A143042 10^n-th number divisible by exactly 4 distinct primes.

660, 2262, 10836, 67512, 510873, 4357756, 39780102, 376957389, 3650049088, 35810556535

Offset

1,1

References

J.-M. De Koninck, Ces nombres qui nous fascinent, Entry 455, pp 94, Ellipses, Paris 2008.

Links

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

Formula

a(n)=A033993(10^n).

Crossrefs

Cf. A033993.

Sequence in context: A364004 A252519 A014362 * A206642 A064261 A235770

Adjacent sequences: A143039 A143040 A143041 * A143043 A143044 A143045

Keyword

more,nonn

Author

Lekraj Beedassy, Jul 18 2008

Extensions

a(8)-a(10) from Donovan Johnson, Mar 30 2010

Status

approved