A098038 Numbers p such that p = (prime(n)+ prime(n+2))/2 is prime for prime indices n=2, 3, 5...

5, 373, 593, 1223, 1511, 1747, 2903, 4409, 5113, 5387, 5563, 5807, 6317, 6367, 9871, 11933, 12653, 13043, 13177, 16097, 18223, 18731, 20347, 20731, 22073, 23893, 24077, 24677, 28069, 30097, 35317, 36313, 40283, 40471, 41479, 41603, 42187

Offset

2,1

Links

Table of n, a(n) for n=2..38.

Example

prime(73)+ prime(75) = 746. 746/2 = 373, the second term in the table.

Prog

(PARI) g(n, m) = forprime(x=1, n, y=(prime(x)+prime(x+m)); if(y%2==0&isprime(y/2), print1(y\2", ")))

Crossrefs

Sequence in context: A237430 A160193 A215437 * A354831 A072172 A278364

Adjacent sequences: A098035 A098036 A098037 * A098039 A098040 A098041

Keyword

easy,nonn

Author

Cino Hilliard, Sep 10 2004

Status

approved