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A081702 Largest prime factor of the n-th Carmichael number (A002997). 5
17, 17, 19, 29, 31, 41, 67, 73, 73, 61, 41, 97, 103, 89, 37, 31, 101, 241, 73, 233, 61, 109, 101, 113, 109, 397, 409, 67, 211, 137, 163, 181, 271, 421, 61, 197, 271, 199, 433, 73, 151, 61, 577, 271, 307, 37, 163, 211, 631, 541, 113, 353, 199, 331, 461, 101, 97 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
FORMULA
a(n) = A006530(A002997(n)). - Amiram Eldar, Jun 24 2019
MATHEMATICA
CarmichaelQ[n_] := Not[PrimeQ[n]] && Divisible[n - 1, CarmichaelLambda[n]]; FactorInteger[#][[-1, 1]]& /@ Select[Range[4, 10^7], CarmichaelQ] (* Amiram Eldar, Jun 24 2019 after Jean-François Alcover at A141710 *)
CROSSREFS
Sequence in context: A291515 A216436 A060360 * A345735 A238235 A333152
KEYWORD
nonn
AUTHOR
Lekraj Beedassy, Apr 02 2003
STATUS
approved

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Last modified March 28 11:46 EDT 2024. Contains 371241 sequences. (Running on oeis4.)