A366582 - OEIS

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A366582

Numbers k such that 6^k + 1 is a semiprime.

%I #9 Oct 14 2023 11:29:19

%S 3,8,11,12,31,43,47,59,62,107,382,514,734,811

%N Numbers k such that 6^k + 1 is a semiprime.

%e 11 is in this sequence because 6^11+1 = 7*51828151 is a semiprime.

%Y Cf. A062394, A001358, A004062, A092559.

%K nonn,more

%O 1,1

%A _Sean A. Irvine_, Oct 13 2023