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

3,2

Links

Table of n, a(n) for n=3..13.

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).

Formula

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

Crossrefs

Cf. A002997, A135717, A006931.

Sequence in context: A225919 A348586 A064768 * A089776 A073626 A065144

Adjacent sequences: A135716 A135717 A135718 * A135720 A135721 A135722

Keyword

nonn,more,changed

Author

Artur Jasinski, Nov 25 2007

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

Status

approved