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1,1
Prime elements of A181862.
Primes p such that A007953(p) = A077196(p).
Contains prime repunits A004022 as a subsequence.
a(5) > 1.4*10^7. - Giovanni Resta, Sep 18 2018
Table of n, a(n) for n=1..4.
Cf. A143027, A181862.
Sequence in context: A131526 A329261 A073622 * A075276 A242233 A294504
Adjacent sequences: A181860 A181861 A181862 * A181864 A181865 A181866
nonn,base,more,hard
Max Alekseyev, Nov 14 2010
approved