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A195439
Numbers n such that 16^n + 1 is a semiprime.
1
3, 5, 7, 8, 10, 16, 23, 26, 32, 37, 64, 89, 149, 173, 251, 307, 317, 956, 30197, 46058
(list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
Table of n, a(n) for n=1..20.
MATHEMATICA
Select[Range[37], PrimeOmega[16^# + 1] == 2 &] (* Arkadiusz Wesolowski, Dec 15 2011 *)
CROSSREFS
Cf. A002590, A057182, A127317.
Sequence in context: A227130 A258025 A239419 * A338446 A190719 A187224
Adjacent sequences: A195436 A195437 A195438 * A195440 A195441 A195442
KEYWORD
nonn
AUTHOR
Arkadiusz Wesolowski, Oct 19 2011
STATUS
approved

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Last modified September 30 02:42 EDT 2024. Contains 376325 sequences.
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