1,1

This sequence appears to contain the squares of all even numbers (A016742) and a thin set of other numbers (A138318).

Table of n, a(n) for n=1..48.

Cf. A138305 (prime primitive roots).

Sequence in context: A324376 A027712 A282139 * A323101 A124693 A095698

Adjacent sequences: A138304 A138305 A138306 * A138308 A138309 A138310

nonn

T. D. Noe, Mar 14 2008

approved