A135719 a(n) is the index of the smallest Carmichael number (A002997) with n prime divisors, or 0 if no such number exists.

1, 11, 40, 403, 1224, 4886, 19096, 120137, 485941, 2974628, 25293838

Offset: 3

Author

Artur Jasinski, Nov 25 2007

Keywords

• nonn
• more

Links

• Claude Goutier, Compressed text file carm10e22.gz containing all the Carmichael numbers up to 10^22.
• Richard Pinch, Tables relating to Carmichael numbers (All the Carmichael numbers up to 10^18).

Crossrefs

Cf. A002997, A135717, A006931.

Formula

A002997(a(n)) = A006931(n). - M. F. Hasler, Apr 14 2015

Extensions

a(8)-a(11) from Donovan Johnson, Feb 23 2012

a(12) from Amiram Eldar, Jul 08 2019

Escape clause added by Jianing Song, Dec 12 2021

a(13) calculated using data from Claude Goutier and added by Amiram Eldar, Apr 20 2024