1,2

Table of n, a(n) for n=1..103.

Cf. A157892 Values of k in A080075.

A080075 Proth numbers: of the form k*2^m + 1 for k odd, m >= 1 and 2^m > k.

Sequence in context: A139094 A159081 A141285 * A264116 A199474 A246694

Adjacent sequences: A157890 A157891 A157892 * A157894 A157895 A157896

nonn

Zak Seidov, Mar 08 2009

approved