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A055553 Number of Carmichael numbers (A002997) less than 10^n. 17

%I

%S 0,0,1,7,16,43,105,255,646,1547,3605,8241,19279,44706,105212,246683,

%T 585355,1401644,3381806,8220777,20138200

%N Number of Carmichael numbers (A002997) less than 10^n.

%D Richard Pinch, Carmichael Numbers up to 10^20, ANTS 7.

%H Romeo Meštrović, <a href="http://arxiv.org/abs/1305.1867">Generalizations of Carmichael numbers I,</a> arXiv:1305.1867v1 [math.NT], May 4, 2013.

%H Richard G. E. Pinch, <a href="https://arxiv.org/abs/math/0504119">The Carmichael numbers up to 10^17</a>, arXiv:math/0504119 [math.NT], 2005.

%H Richard G. E. Pinch, <a href="http://www.chalcedon.demon.co.uk/rgep/p73.ps">The Carmichael numbers up to 10^{17}</a>, April 2005.

%H Richard G. E. Pinch, <a href="http://arXiv.org/abs/math/0604376">The Carmichael numbers up to 10^18</a>, arXiv:math/0604376 [math.NT], 2006.

%H Richard G. E. Pinch, <a href="http://www.chalcedon.demon.co.uk/rgep/publish.html#76">Carmichael numbers up to 10^18</a>, April 2006.

%H Richard G. E. Pinch, <a href="http://www.chalcedon.demon.co.uk/rgep/p82.pdf">The Carmichael numbers up to 10^21</a>, May 2007; <a href="http://www.tucs.fi/publications/insight.php?id=pErJuKaLe07a&amp;table=proceeding">Proceedings of Conference on Algorithmic Number Theory 2007</a> - _Charles R Greathouse IV_, Feb 01 2009

%H Richard G. E. Pinch, <a href="http://www.math.tu-berlin.de/~kant/ants/poster.html">ANTS 7 Posters</a>

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

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

%Y Cf. A002997.

%K nonn

%O 1,4

%A _Eric W. Weisstein_

%E Updates from Pinch's articles sent by _Charles R Greathouse IV_, Dec 04 2005, Jul 16 2006, May 29 2007

%E a(21) from Pinch's paper by _Charles R Greathouse IV_, Feb 01 2009

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Last modified June 4 02:22 EDT 2020. Contains 334812 sequences. (Running on oeis4.)