1,2

Limit_{n->inf.} a(n)/10^n -> 1-e^(-1/2).

ip={ the list of irregular primes to 12 million }; Table[ Length[ Select[ip, # < Prime[10^n] &]], {n, 5}]

Cf. A105459, A105463.

Sequence in context: A125441 A142756 A142327 this_sequence A077508 A077514 A010945

Adjacent sequences: A105465 A105466 A105467 this_sequence A105469 A105470 A105471

hard,nonn

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