A366719 - OEIS

A366719

Smallest prime dividing 12^n + 1.

2, 13, 5, 7, 89, 13, 5, 13, 17, 7, 5, 13, 89, 13, 5, 7, 153953, 13, 5, 13, 41, 7, 5, 13, 17, 13, 5, 7, 89, 13, 5, 13, 769, 7, 5, 13, 89, 13, 5, 7, 17, 13, 5, 13, 89, 7, 5, 13, 7489, 13, 5, 7, 89, 13, 5, 13, 17, 7, 5, 13, 41, 13, 5, 7, 36097, 13, 5, 13, 89, 7

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OFFSET

0,1

LINKS

Max Alekseyev, Table of n, a(n) for n = 0..511

FORMULA

a(n) = A020639(A178248(n)). - Paul F. Marrero Romero, Oct 25 2023

MATHEMATICA

Table[FactorInteger[12^n + 1][[1, 1]], {n, 0, 69}] (* Paul F. Marrero Romero, Oct 25 2023 *)

CROSSREFS

Cf. A002586, A038371, A178248, A366712, A366713, A366714, A366715, A366716, A366717, A366720.

Sequence in context: A093079 A095417 A369587 * A129733 A084160 A238139

Adjacent sequences: A366716 A366717 A366718 * A366720 A366721 A366722

KEYWORD

nonn

AUTHOR

Sean A. Irvine, Oct 17 2023

STATUS

approved