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A105456 Number of irregular primes less than 2^n. +0
3
0, 0, 0, 0, 0, 2, 5, 9, 28, 64, 124, 225, 408, 763, 1378, 2566, 4803, 9005, 16948, 32300, 61408, 116688, 222091 (list; graph; listen)
OFFSET

1,6

MATHEMATICA

ip={ the list of irregular primes to 12 million }; Table[ Length[ Select[ip, # < 2^n &]], {n, 23}]

CROSSREFS

Cf. A007053, A105460, A105465.

Sequence in context: A094600 A139796 A086586 this_sequence A128565 A151952 A090291

Adjacent sequences: A105453 A105454 A105455 this_sequence A105457 A105458 A105459

KEYWORD

hard,nonn

AUTHOR

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

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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.


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