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

1,4

References

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

Links

Table of n, a(n) for n=1..19.

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.

Sequence in context: A071101 A110580 A351283 * A086750 A086749 A194541

Adjacent sequences: A055549 A055550 A055551 * A055553 A055554 A055555

Keyword

nonn,hard,more

Author

Eric W. Weisstein

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