OFFSET
1,4
LINKS
Jan Feitsma, The pseudoprimes below 2^64 - statistics.
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. But beware of errors!
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Amiram Eldar, Mar 05 2018
EXTENSIONS
Corrected and extended by Daniel Suteu, Dec 10 2019
STATUS
approved