A055552 Number of base-2 strong pseudoprimes (A001262) less than 10^n.

0, 0, 0, 5, 16, 46, 162, 488, 1282, 3291, 8607, 22407, 58892, 156251, 419489, 1135860, 3115246, 8646507, 24220195

Offset: 1

Author

Eric W. Weisstein

Keywords

• nonn
• hard
• more

References

• Paulo Ribenboim, The Little Book of Bigger Primes, Springer-Verlag NY 2004. See p. 219.

Links

• William Galway, Tables of pseudoprimes and related data.
• Eric Weisstein's World of Mathematics, Pseudoprime.
• Eric Weisstein's World of Mathematics, Strong Pseudoprime.
• Index entries for sequences related to pseudoprimes.

Crossrefs

Cf. A001262.

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