A143041 - OEIS

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A143041

10^n-th number divisible by exactly 3 distinct primes.

105, 455, 2988, 26128, 258764, 2677258, 28013887, 293553638, 3072062072, 32084334808 (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)=A033992(10^n).`
	CROSSREFS	`Cf. A033992.` `Sequence in context: A165060 A165069 A200834 * A078420 A152826 A133767` `Adjacent sequences: A143038 A143039 A143040 * A143042 A143043 A143044`
	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 13 12:17 EST 2012. Contains 205469 sequences.