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A105464 Irregular primeth recurrence: a(n+1) = a(n)-th irregular prime. 0
1, 37, 613, 12923, 390581 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

COMMENTS

There are 310443 irregular primes less than 12 million.

MATHEMATICA

ip={ the list of irregular primes to 12 million }; NestList[ ip[[ # ]] &, 1, 2]

CROSSREFS

Cf. A007097.

Sequence in context: A156226 A133998 A056217 * A140764 A156923 A104180

Adjacent sequences:  A105461 A105462 A105463 * A105465 A105466 A105467

KEYWORD

hard,nonn

AUTHOR

Robert G. Wilson v (rgwv(AT)rgwv.com), Apr 07 2005

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Last modified February 16 05:39 EST 2012. Contains 205860 sequences.