login
A303008
Even pseudoprimes m (A006935) such that 2m+1 is prime.
2
2, 126217792286, 600030498926, 1248599869826, 226537279412126, 7615111129051346, 9609149773927166, 17502271515299726, 20140666152370226, 126921319513852046, 133564589570047406, 141572739574418846, 185615640867777506, 193420934175277166
OFFSET
1,1
COMMENTS
For n>1, 2*a(n)+1 belongs to A300193.
CROSSREFS
Subsequence of A006935.
Sequence in context: A154423 A072293 A158343 * A139180 A072947 A077303
KEYWORD
nonn,hard
AUTHOR
Max Alekseyev, Apr 17 2018
STATUS
approved