A175319 Half-sums (averages) of two primes with indices that are primes with prime indices.

5, 8, 11, 18, 21, 31, 32, 35, 45, 59, 66, 69, 79, 92, 93, 95, 105, 119, 127, 141, 144, 153, 154, 168, 171, 179, 181, 195, 202, 218, 221, 228, 229, 231, 245, 255, 277, 279, 302, 304, 305, 315, 329, 331, 354, 357, 360, 363, 370, 381, 384, 389, 418, 431, 438, 444

Offset: 1

Author

Jason Kimberley, Apr 04 2010

Keywords

• easy
• nonn

Comments

The complement is A175320 which appears to be finite.

Computed at the suggestion of Jonathan Vos Post.

Crossrefs

Cf. A174681

Formula

(A038580(i) + A038580(j))/2