A138307 Even numbers not representable as p+g, where p is a prime and g is a prime primitive root of p.

2, 4, 6, 14, 16, 26, 36, 38, 64, 100, 144, 196, 206, 256, 324, 332, 400, 484, 530, 576, 676, 784, 900, 1024, 1156, 1296, 1444, 1600, 1764, 1936, 2116, 2304, 2500, 2704, 2916, 3136, 3364, 3600, 3844, 4096, 4356, 4624, 4900, 5184, 5476, 5776, 6084, 6400

Offset

1,1

Comments

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

Links

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

Crossrefs

Cf. A138305 (prime primitive roots).

Sequence in context: A027712 A282139 A379486 * A323101 A124693 A358671

Adjacent sequences: A138304 A138305 A138306 * A138308 A138309 A138310

Keyword

nonn

Author

T. D. Noe, Mar 14 2008

Status

approved