A081702 Largest prime factor of the n-th Carmichael number (A002997).

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

Offset

1,1

Links

Amiram Eldar, Table of n, a(n) for n = 1..10000

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

Cf. A002997, A006530.

Sequence in context: A291515 A216436 A060360 * A345735 A238235 A333152

Adjacent sequences: A081699 A081700 A081701 * A081703 A081704 A081705

Keyword

nonn

Author

Lekraj Beedassy, Apr 02 2003

Status

approved