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 A080798 Largest prime factor of 3^n-2. 3
 7, 5, 79, 241, 727, 23, 937, 19681, 431, 499, 4703, 8093, 40193, 2869781, 483671, 94747, 4657, 232452293, 498112057, 2812679, 31381059607, 3765727153, 1364071, 44594137339, 125231, 13170403, 5353801183, 4159349, 46050353857 (list; graph; refs; listen; history; text; internal format)
 OFFSET 2,1 LINKS Hugo Pfoertner, Table of n, a(n) for n = 2..210 FORMULA a(n) = A006530(A058481(n)). - Michel Marcus, Jul 12 2019 PROG (PARI) a(n) = vecmax(factor(3^n-2)[, 1]); \\ Michel Marcus, Jul 12 2019 (MAGMA) [Max(PrimeDivisors(3^n-2)):n in [2..30]]; // Marius A. Burtea, Jul 12 2019 CROSSREFS Cf. A014224, A014232, A080443, A080892. Cf. A006530, A058481. Sequence in context: A038271 A329008 A005692 * A007553 A294474 A248277 Adjacent sequences:  A080795 A080796 A080797 * A080799 A080800 A080801 KEYWORD nonn AUTHOR Hugo Pfoertner, Mar 25 2003 STATUS approved

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Last modified June 25 04:09 EDT 2021. Contains 345452 sequences. (Running on oeis4.)