login
This site is supported by donations to The OEIS Foundation.

 

Logo

Annual Appeal: Please make a donation (tax deductible in USA) to keep the OEIS running. Over 5000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A202562 Carmichael numbers whose prime factors do not divide any smaller Carmichael number. 1
561, 84350561, 851703301, 2436691321, 34138047673, 60246018673, 63280622521, 83946864769, 110296864801, 114919915021, 155999871721, 225593397919, 342267565249, 534919693681, 660950414671, 733547013841, 1079942171239, 1301203515361, 1333189866793 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Note that all terms so far have only three prime factors.

LINKS

Donovan Johnson, Table of n, a(n) for n = 1..1377 (terms < 10^18)

Eric Weisstein's World of Mathematics, Carmichael Number

Index entries for sequences related to Carmichael numbers

EXAMPLE

a(2) = 84350561 because 84350561 = 107*743*1061 and the smaller Carmichael numbers do not have the factors 107, 743 or 1061.

CROSSREFS

Cf. A002997, A087788.

Sequence in context: A258839 A213867 A139089 * A252352 A252345 A121508

Adjacent sequences:  A202559 A202560 A202561 * A202563 A202564 A202565

KEYWORD

nonn

AUTHOR

Arkadiusz Wesolowski, Dec 21 2011

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified December 4 06:30 EST 2016. Contains 278749 sequences.