A366670 - OEIS

%I #16 Jan 06 2024 14:16:29

%S 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,

%T 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,

%U 7,1297,7,13,7,17,7,37,7,41,7,37,7,4926056449,7,13,7,137

%N Smallest prime dividing 6^n + 1.

%H Max Alekseyev, <a href="/A366670/b366670.txt">Table of n, a(n) for n = 0..4095</a>

%F a(n) = A020639(A062394(n)). - _Paul F. Marrero Romero_, Oct 17 2023

%t Table[FactorInteger[6^n + 1][[1,1]], {n, 0, 68}] (* _Paul F. Marrero Romero_, Oct 17 2023 *)

%Y Cf. A020639, A062394, A274904, A366630.

%Y Cf. A002586, A366609, A366671, A038371, A366719.

%K nonn

%O 0,1

%A _Sean A. Irvine_, Oct 15 2023