A225005 Number of Carmichael numbers (A002997) less than 2^n.

0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 3, 5, 6, 9, 10, 15, 19, 23, 33, 45, 55, 69, 95, 130, 162, 214, 290, 375, 483, 656, 864, 1118, 1446, 1874, 2437, 3130, 4058, 5188, 6642, 8521, 11002, 14236, 18400, 23631, 30521, 39376, 50685, 65590, 84817, 109857, 141892, 183507, 237217, 307278, 398506, 517446, 672105, 873109, 1136472, 1479525, 1927138, 2513234, 3278553, 4279356

Offset: 1

Author

Max Alekseyev, Apr 23 2013

Keywords

• nonn

Links

• Amiram Eldar, Table of n, a(n) for n = 1..73 (terms 65..69 added using A182490; terms 70..73 calculated using data from Claude Goutier)
• Jan Feitsma, The pseudoprimes below 2^64 - statistics. [Wayback Machine link]
• Jan Feitsma and William Galway, Tables of pseudoprimes and related data.
• Claude Goutier, Compressed text file carm10e22.gz containing all the Carmichael numbers up to 10^22.

Crossrefs

Cf. A002997, A055553, A208276, A108797.

Partial sums of A182490.