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A055552
Number of base-2 strong pseudoprimes (A001262) less than 10^n.
4
0, 0, 0, 5, 16, 46, 162, 488, 1282, 3291, 8607, 22407, 58892, 156251, 419489, 1135860, 3115246, 8646507, 24220195
OFFSET
1,4
REFERENCES
Paulo Ribenboim, The Little Book of Bigger Primes, Springer-Verlag NY 2004. See p. 219.
LINKS
Eric Weisstein's World of Mathematics, Pseudoprime.
Eric Weisstein's World of Mathematics, Strong Pseudoprime.
CROSSREFS
Cf. A001262.
Sequence in context: A071101 A110580 A351283 * A086750 A086749 A194541
KEYWORD
nonn,hard,more
EXTENSIONS
Corrected by Shyam Sunder Gupta, Mar 04 2002
a(14)-a(15) from Charles R Greathouse IV, Aug 15 2006
a(16)-a(19) from Charles R Greathouse IV, Mar 14 2011
STATUS
approved