OFFSET

1,1

COMMENTS

Also known as extended Chernick Carmichael numbers.

Each term of this sequence is the product of 3 or more distinct prime factors.

LINKS

Daniel Suteu, Table of n, a(n) for n = 1..10081

Jack Chernick, On Fermat's simple theorem, Bull. Amer. Math. Soc. 45:4 (1939), pp. 269-274.

Daniel Suteu, Perl program

Eric Weisstein's World of Mathematics, Carmichael Number

CROSSREFS

KEYWORD

nonn

AUTHOR

Daniel Suteu, Jul 21 2018

STATUS

approved