1,1

Odd prime p is in the sequence iff A064078(A002326((p-1)/2))=p. For example, for p=127 we have A002326((127-1)/2)=7 and A064078(7)=127. Thus p=127 is in the sequence.

Overpseudoprimes to base 2 are odd, then a(1)=2

A141232 A002326 A064078 A112927

Sequence in context: A068192 A002200 A069709 this_sequence A069090 A088415 A139054

Adjacent sequences: A144752 A144753 A144754 this_sequence A144756 A144757 A144758

nonn

Vladimir Shevelev (shevelev(AT)bgu.ac.il), Sep 20 2008