A366582 Numbers k such that 6^k + 1 is a semiprime.

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

Offset

1,1

Links

Table of n, a(n) for n=1..14.

Example

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

Crossrefs

Cf. A062394, A001358, A004062, A092559.

Sequence in context: A310280 A020680 A243169 * A051245 A373831 A265897

Adjacent sequences: A366579 A366580 A366581 * A366583 A366584 A366585

Keyword

nonn,more

Author

Sean A. Irvine, Oct 13 2023

Status

approved