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

Author

T. D. Noe, Mar 14 2008

Keywords

• nonn

Comments

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

Crossrefs

Cf. A138305 (prime primitive roots).