A299710 Number of ten-prime Carmichael numbers less than 10^n.

23, 340, 3058, 20738, 114232, 547528, 2347828

Offset

16,1

Links

Table of n, a(n) for n=16..22.

Claude Goutier, Text file readme.text summarizing enumeration of Carmichael numbers up to 10^22.

Claude Goutier, Text file readme.text summarizing enumeration of Carmichael numbers up to 10^22. [Local copy, with permission]

Richard Pinch, Tables relating to Carmichael numbers.

Crossrefs

For k-prime Carmichael numbers up to 10^n for k = 3,4,...,11, see A132195, A174612, A174613, A174614, A174615, A174616, A174617, A299710, A299711.

Cf. A002997, A006931, A055553.

Sequence in context: A028110 A163512 A028059 * A028055 A026324 A028039

Adjacent sequences: A299707 A299708 A299709 * A299711 A299712 A299713

Keyword

nonn,more,hard

Author

Tim Johannes Ohrtmann, Feb 17 2018

Extensions

a(22) from Claude Goutier added by Amiram Eldar, Apr 19 2024

Status

approved