A106558 - OEIS

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A106558

a(n)=1+floor(sqrt(Pi/2)*p(n)#).

3, 8, 38, 264, 2896, 37638, 639830, 12156759, 279605448, 8108557990, 251365297667, 9300516013674 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	COMMENTS	`a(n) is an approximation to the number of primes less than p(n+1)#`
	CROSSREFS	`Cf. A000849.` `Sequence in context: A089066 A099030 A190658 * A065914 A180368 A108262` `Adjacent sequences: A106555 A106556 A106557 * A106559 A106560 A106561`
	KEYWORD	`nonn`
	AUTHOR	`Pierre CAMI (pierre-cami(AT)bbox.fr), May 09 2005`

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Last modified February 17 21:13 EST 2012. Contains 206085 sequences.