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A112430 Carmichael numbers equal to the product of 7 primes. 6
5394826801, 6295936465, 12452890681, 13577445505, 15182481601, 20064165121, 22541365441, 24673060945, 26242929505, 26602340401, 27405110161, 28553256865, 33203881585, 38059298641, 39696166081, 40460634865 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Amiram Eldar, Table of n, a(n) for n = 1..10000

EXAMPLE

a(1) = 5394826801 = 7*13*17*23*31*67*73.

PROG

(PARI) is(n)={bigomega(n)==7&&is_A002997(n)} \\ M. F. Hasler, Apr 14 2015

CROSSREFS

Cf. A002997, A087788, A141711, A074379, A112428, A112429, A112431, A112432, A006931.

Sequence in context: A133688 A306497 A115414 * A272714 A213254 A295458

Adjacent sequences:  A112427 A112428 A112429 * A112431 A112432 A112433

KEYWORD

easy,nonn

AUTHOR

Shyam Sunder Gupta, Dec 11 2005

STATUS

approved

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Last modified May 24 23:45 EDT 2020. Contains 334581 sequences. (Running on oeis4.)