1,1

To check if p divides 2^(3^n)+97 for some n, we need to test only n from 1 to phi(p-1).

Table of n, a(n) for n=1..56.

Cf. A123239.

Sequence in context: A158845 A163786 A153507 * A038889 A152652 A142339

Adjacent sequences: A124274 A124275 A124276 * A124278 A124279 A124280

nonn

A.K. Devaraj, Oct 24 2006

Corrected and edited by Max Alekseyev, Oct 30 2006

approved