A055728 - OEIS

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A055728

Number of prime lucky numbers <10^n.

0, 2, 9, 43, 211, 1300, 8616, 62446, 469146, 3656784 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	LINKS	`Index entries for sequences related to numbers of primes in various ranges`
	MATHEMATICA	`lst = Range[1, 10^8, 2]; i = 2; While[ i <= (len = Length@lst) && (k = lst[[i]]) <= len, lst = Drop[lst, {k, len, k}]; i++ ]; Table[Length@ Select[lst, PrimeQ@# && # < 10^n &], {n, 0, 8}] - Robert G. Wilson v (rgwv(at)rgwv.com), May 12 2006`
	CROSSREFS	`This is the intersection of the lucky numbers (A000959) and the prime numbers (A000040).` `Sequence in context: A121365 A018960 A002310 * A006795 A055824 A020113` `Adjacent sequences: A055725 A055726 A055727 * A055729 A055730 A055731`
	KEYWORD	`nonn`
	AUTHOR	`Robert G. Wilson v (rgwv(AT)rgwv.com), Jun 09 2000`
	EXTENSIONS	`a(7) & a(8) from Robert G. Wilson v (rgwv(at)rgwv.com), May 12 2006` `a(9) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Jul 06 2010`

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Last modified February 16 12:15 EST 2012. Contains 205909 sequences.