login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A175319 Half-sums (averages) of two primes with indices that are primes with prime indices. 1
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The complement is A175320 which appears to be finite.

Computed at the suggestion of Jonathan Vos Post.

LINKS

Table of n, a(n) for n=1..56.

FORMULA

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

CROSSREFS

Cf. A174681

Sequence in context: A314397 A314398 A314399 * A154486 A162612 A314400

Adjacent sequences:  A175316 A175317 A175318 * A175320 A175321 A175322

KEYWORD

easy,nonn

AUTHOR

Jason Kimberley, Apr 04 2010

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified November 15 21:17 EST 2019. Contains 329151 sequences. (Running on oeis4.)