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A050863
Numbers n such that 223*2^n1 is a prime.
0
3, 19, 91, 211, 699, 819, 1323, 4635, 38019, 307755
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OFFSET
1,1
LINKS
Table of n, a(n) for n=1..10.
Ray Ballinger and Wilfrid Keller,
List of primes k.2^n + 1 for k < 300
Wilfrid Keller,
List of primes k.2^n  1 for k < 300
Index entries for sequences of n such that k*2^n1 (or k*2^n+1) is a prime
Kosmaj,
Riesel list k<300
.
CROSSREFS
Sequence in context:
A204256
A015528
A183384
*
A283380
A049153
A074361
Adjacent sequences:
A050860
A050861
A050862
*
A050864
A050865
A050866
KEYWORD
hard
,
nonn
AUTHOR
N. J. A. Sloane
, Dec 29 1999
EXTENSIONS
More terms from Herman Jamke (hermanjamke(AT)fastmail.fm), Jan 02 2008
STATUS
approved
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Last modified September 28 18:05 EDT 2023. Contains 365736 sequences. (Running on oeis4.)