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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A153580 Terms of A083737 which are not Carmichael numbers (A002997). 3
721801, 873181, 4504501, 8646121, 9006401, 9863461, 10403641, 12322133, 14609401, 15913261, 18595801, 18736381, 20234341, 21397381, 22066201, 22369621, 22885129, 25326001, 25696133, 28312921, 36307981, 42702661 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..22.

MATHEMATICA

Select[Range[5*10^7], ! PrimeQ[ # ] && PowerMod[2, # - 1, # ] == 1 && PowerMod[3, # - 1, # ] == 1 && PowerMod[5, # - 1, # ] == 1 && Mod[ #, CarmichaelLambda[ # ]] != 1 &] (* Ray Chandler *)

CROSSREFS

Cf. A002997, A083737, A122780, A153508, A153513, A153514, A153515, A153519, A153581.

Sequence in context: A250372 A015346 A190932 * A153581 A100383 A250153

Adjacent sequences:  A153577 A153578 A153579 * A153581 A153582 A153583

KEYWORD

nonn

AUTHOR

Ray Chandler & Artur Jasinski, Dec 28 2008

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
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 22 08:56 EDT 2019. Contains 322329 sequences. (Running on oeis4.)