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A138307 Even numbers not representable as p+g, where p is a prime and g is a prime primitive root of p. 2
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 (list; graph; refs; listen; history; text; internal format)
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: A324376 A027712 A282139 * A323101 A124693 A095698

Adjacent sequences:  A138304 A138305 A138306 * A138308 A138309 A138310

KEYWORD

nonn

AUTHOR

T. D. Noe, Mar 14 2008

STATUS

approved

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Last modified January 25 19:09 EST 2020. Contains 331249 sequences. (Running on oeis4.)