A138319 Number of ways in which 2n can be represented as p+g, where p is a prime and g is a prime primitive root of p.
0, 0, 0, 1, 1, 1, 0, 0, 1, 2, 2, 2, 0, 2, 1, 2, 2, 0, 0, 2, 3, 1, 1, 4, 1, 2, 2, 2, 3, 2, 1, 0, 1, 1, 3, 3, 1, 1, 5, 1, 3, 3, 2, 2, 2, 2, 1, 3, 1, 0, 6, 4, 1, 5, 1, 3, 3, 2, 3, 5, 2, 2, 4, 1, 6, 5, 2, 2, 4, 1, 3, 0, 2, 2, 6, 1, 3, 7, 2, 5, 6, 1, 3, 5, 3, 4, 4, 2, 2, 7, 1, 4, 1, 1, 6, 5, 1, 0, 2, 3, 4, 5, 0, 4, 7
Offset: 1
Keywords
Links
- T. D. Noe, Table of n, a(n) for n=1..10000