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A300418 Number of semiprime Fermat pseudoprimes to base 2 (A214305) less than 10^n. 0
0, 0, 1, 11, 34, 107, 311, 880, 2455, 6501, 17207, 46080, 123877, 334567, 915443, 2520503, 7002043 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..17.

William F. Galway, The Density of Pseudoprimes with Two Prime Factors.

Aran Nayebi, On the distribution of Carmichael numbers, arXiv preprint arXiv:0906.3533 [math.NT], 2009-2013.

CROSSREFS

Cf. A055550, A214305.

Sequence in context: A063162 A211014 A103661 * A041539 A233933 A041232

Adjacent sequences:  A300415 A300416 A300417 * A300419 A300420 A300421

KEYWORD

nonn,more

AUTHOR

Amiram Eldar, Mar 05 2018

STATUS

approved

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Last modified October 18 17:13 EDT 2019. Contains 328186 sequences. (Running on oeis4.)