A075280 Interprimes which are of the form s*prime, s=5.

15, 205, 515, 1465, 1795, 1895, 2105, 3265, 3505, 3665, 4105, 4415, 4535, 4555, 4685, 5045, 6185, 7115, 7835, 8135, 8185, 9655, 9865, 10085, 10645, 11015, 11405, 12085, 12295, 12385, 13235, 14395, 16045, 16355, 16735, 17065

Offset

1,1

Comments

Interprimes which are of the form s*prime are in A075277-A075296 (s = 2-21). Case s = 1 is impossible.

Links

Table of n, a(n) for n=1..36.

Example

205 is an interprime and 205/5 = 41 is prime.

Mathematica

s=5; Select[Table[(Prime[n+1]+Prime[n])/2, {n, 2, 1000}], PrimeQ[ #/s]&]

Crossrefs

Cf. A075277-A075296.

Sequence in context: A215903 A373294 A070968 * A093747 A061637 A231546

Adjacent sequences: A075277 A075278 A075279 * A075281 A075282 A075283

Keyword

easy,nonn

Author

Zak Seidov, Sep 12 2002

Status

approved