A072687 - OEIS

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A072687

Number of primes with prime length names in range 1 -> 10^n.

3, 8, 39, 269, 3047, 14288, 140205, 294050 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	EXAMPLE	`E.g. from sequence of the valid primes (A072686) there are three prime length primes between 1 and 10: 2,3,7; therefore a(1)=3.`
	CROSSREFS	`Cf. A072686.` `Sequence in context: A180368 A108262 A034892 * A110561 A107991 A007175` `Adjacent sequences: A072684 A072685 A072686 * A072688 A072689 A072690`
	KEYWORD	`more,nonn,word`
	AUTHOR	`Mark Hudson (mrmarkhudson(AT)hotmail.com), Jul 02 2002`
	EXTENSIONS	`a(6)-a(8) from Sean A. Irvine (sairvin(AT)xtra.co.nz), Nov 08 2011`

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Last modified February 15 17:13 EST 2012. Contains 205828 sequences.