1,1

It seems that a(n)=2^A000043(n) = M(n)+1 where M(n) is the n-th Mersenne prime

Cf. A000043.

Adjacent sequences: A072865 A072866 A072867 this_sequence A072869 A072870 A072871

Sequence in context: A103970 A034785 A075398 this_sequence A098579 A032467 A009265

easy,nonn

Benoit Cloitre (benoit7848c(AT)orange.fr), Jul 27 2002