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A366824
Numbers k such that gcd(2^k + 1, k! - 1) has a prime divisor different from 2*k + 1.
2
221799, 300081, 338884, 3652374, 8161701, 10802625, 13602835, 18004375, 80187723, 133646205
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OFFSET
1,1
COMMENTS
Possible prime divisors are listed in
A366823
.
Different terms may correspond to the same prime. For example, both a(1) and a(2) produce prime
A366823
(1) = 521881.
LINKS
Table of n, a(n) for n=1..10.
CROSSREFS
Subsequence of
A068480
.
Cf.
A366823
.
Sequence in context:
A321160
A390420
A223369
*
A254509
A254516
A254816
Adjacent sequences:
A366821
A366822
A366823
*
A366825
A366826
A366827
KEYWORD
nonn
,
hard
,
more
AUTHOR
Rustem Aidagulov and
Max Alekseyev
, Oct 24 2023
STATUS
approved
