A138318 Even nonsquares not representable as p+g, where p is a prime and g is a prime primitive root of p.

2, 6, 14, 26, 38, 206, 332, 530, 8000, 32768, 85184, 125000, 175616

Offset

1,1

Comments

This is a subsequence of A138307. Terms starting with a(9) are cubes: 20^3, 32^3, 44^3, 50^3 and 56^3.

Links

Table of n, a(n) for n=1..13.

Crossrefs

Cf. A138305 (prime primitive roots).

Sequence in context: A102486 A063620 A162716 * A212964 A279742 A068042

Adjacent sequences: A138315 A138316 A138317 * A138319 A138320 A138321

Keyword

nonn

Author

T. D. Noe, Mar 14 2008

Status

approved