A143042 - OEIS

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A143042

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

660, 2262, 10836, 67512, 510873, 4357756, 39780102, 376957389, 3650049088, 35810556535 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	REFERENCES	`J.-M. De Koninck, Ces nombres qui nous fascinent, Entry 455, pp 94, Ellipses, Paris 2008.`
	FORMULA	`a(n)=A033993(10^n).`
	CROSSREFS	`Cf. A033993.` `Sequence in context: A067235 A113171 A014362 * A064261 A204538 A204534` `Adjacent sequences: A143039 A143040 A143041 * A143043 A143044 A143045`
	KEYWORD	`more,nonn`
	AUTHOR	`Lekraj Beedassy (blekraj(AT)yahoo.com), Jul 18 2008`
	EXTENSIONS	`a(8)-a(10) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Mar 30 2010`

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Last modified February 17 23:49 EST 2012. Contains 206085 sequences.