OFFSET
0,1
LINKS
J. Brillhart et al., Factorizations of b^n +- 1, Contemporary Mathematics, Vol. 22, Amer. Math. Soc., Providence, RI, 3rd edition, 2002.
FORMULA
a(n) = A002587(3*n). - Amiram Eldar, Feb 02 2020
MAPLE
8^4 + 1 = 4097 = 17*241, so a(4) = 241.
MATHEMATICA
Table[FactorInteger[8^n + 1][[-1, 1]], {n, 0, 40}]
PROG
(Magma) [Maximum(PrimeDivisors(8^n+1)): n in [0..40]];
CROSSREFS
KEYWORD
nonn
AUTHOR
Vincenzo Librandi, Jul 11 2016
EXTENSIONS
Terms to a(100) in b-file from Vincenzo Librandi, Jul 12 2016
a(101)-a(354) in b-file from Amiram Eldar, Feb 02 2020
a(355)-a(502) in b-file from Max Alekseyev, May 28 2022, Sep 06 2022, Feb 25 2023
STATUS
approved