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


%S 0,0,0,5,16,46,162,488,1282,3291,8607,22407,58892,156251,419489,

%T 1135860,3115246,8646507,24220195

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

%H William Galway, <a href="http://www.cecm.sfu.ca/Pseudoprimes/index-2-to-64.html">Tables of pseudoprimes and related data</a>.

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/Pseudoprime.html">Pseudoprime</a>

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/StrongPseudoprime.html">Strong Pseudoprime</a>

%H <a href="/index/Ps#pseudoprimes">Index entries for sequences related to pseudoprimes</a>

%Y Cf. A001262.

%K nonn,hard

%O 1,4

%A _Eric W. Weisstein_

%E Corrected by _Shyam Sunder Gupta_, Mar 04 2002

%E a(14)-a(15) from _Charles R Greathouse IV_, Aug 15 2006

%E a(16)-a(19) from _Charles R Greathouse IV_, Mar 14, 2011

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Last modified December 17 22:43 EST 2014. Contains 252040 sequences.