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A240105
Integers n such that 2n^k + 1, for k = 2..7, are prime.
0
1, 3490575, 83972646, 414180489, 476072025, 1881147720, 3020243916, 3188924769, 3285167214, 3543143220
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OFFSET
1,2
COMMENTS
First n>1 such that 2n^k+1, for k=2..8, are prime, is a(3) = 83972646.
Subsequence of
A240099
: a(2) = 3490575 =
A240099
(4), a(3) = 83972646 =
A240099
(22).
LINKS
Table of n, a(n) for n=1..10.
CROSSREFS
Cf.
A089001
,
A168550
,
A239874
,
A239925
,
A240099
.
Sequence in context:
A349065
A204335
A365888
*
A205766
A183790
A256770
Adjacent sequences:
A240102
A240103
A240104
*
A240106
A240107
A240108
KEYWORD
nonn
,
more
AUTHOR
Zak Seidov
, Apr 01 2014
STATUS
approved
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Last modified June 25 03:44 EDT 2024. Contains 373694 sequences. (Running on oeis4.)