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Terms of A083737 which are not Carmichael numbers (A002997).
4

%I #18 Jun 24 2019 11:07:11

%S 721801,873181,4504501,8646121,9006401,9863461,10403641,12322133,

%T 14609401,15913261,18595801,18736381,20234341,21397381,22066201,

%U 22369621,22885129,25326001,25696133,28312921,36307981,42702661

%N Terms of A083737 which are not Carmichael numbers (A002997).

%H Amiram Eldar, <a href="/A153580/b153580.txt">Table of n, a(n) for n = 1..2871</a> (calculated from the b-file at A083737)

%t Select[Range[5*10^7], ! PrimeQ[ # ] && PowerMod[2, # - 1, # ] == 1 && PowerMod[3, # - 1, # ] == 1 && PowerMod[5, # - 1, # ] == 1 && Mod[ #, CarmichaelLambda[ # ]] != 1 &] (* _Ray Chandler_, Dec 28 2008 *)

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

%K nonn

%O 1,1

%A _Ray Chandler_ & _Artur Jasinski_, Dec 28 2008

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Last modified September 20 14:16 EDT 2024. Contains 376072 sequences. (Running on oeis4.)