A105458 - OEIS

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A105458

Number of irregular primes less than 3^n.

0, 0, 0, 3, 9, 48, 131, 334, 880, 2355, 6341, 17157, 47620, 132015 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,4`
	MATHEMATICA	`ip={ the list of irregular primes to 12 million }; Table[ Length[ Select[ip, # < 3^n &]], {n, 14}]`
	CROSSREFS	`Cf. A055729, A105462, A105467.` `Sequence in context: A129432 A111551 A102929 * A183952 A141051 A001530` `Adjacent sequences: A105455 A105456 A105457 * A105459 A105460 A105461`
	KEYWORD	`hard,nonn`
	AUTHOR	`Robert G. Wilson v (rgwv(AT)rgwv.com), Apr 07 2005`

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Last modified February 15 15:20 EST 2012. Contains 205823 sequences.