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A366670
Smallest prime dividing 6^n + 1.
6
2, 7, 37, 7, 1297, 7, 13, 7, 17, 7, 37, 7, 1297, 7, 37, 7, 353, 7, 13, 7, 41, 7, 37, 7, 17, 7, 37, 7, 281, 7, 13, 7, 2753, 7, 37, 7, 577, 7, 37, 7, 17, 7, 13, 7, 89, 7, 37, 7, 193, 7, 37, 7, 1297, 7, 13, 7, 17, 7, 37, 7, 41, 7, 37, 7, 4926056449, 7, 13, 7, 137
OFFSET
0,1
LINKS
FORMULA
a(n) = A020639(A062394(n)). - Paul F. Marrero Romero, Oct 17 2023
MATHEMATICA
Table[FactorInteger[6^n + 1][[1, 1]], {n, 0, 68}] (* Paul F. Marrero Romero, Oct 17 2023 *)
KEYWORD
nonn
AUTHOR
Sean A. Irvine, Oct 15 2023
STATUS
approved