This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A075280 #6 Mar 30 2012 17:26:03
%S A075280 15,205,515,1465,1795,1895,2105,3265,3505,3665,4105,4415,4535,4555,
%T A075280 4685,5045,6185,7115,7835,8135,8185,9655,9865,10085,10645,11015,11405,
%U A075280 12085,12295,12385,13235,14395,16045,16355,16735,17065
%N A075280 Interprimes which are of the form s*prime, s=5.
%C A075280 Interprimes which are of the form s*prime are in A075277-A075296 (s = 2-21). Case s = 1 is impossible.
%e A075280 205 is an interprime and 205/5 = 41 is prime.
%t A075280 s=5; Select[Table[(Prime[n+1]+Prime[n])/2, {n, 2, 1000}], PrimeQ[ #/s]&]
%Y A075280 Cf. A075277-A075296.
%K A075280 easy,nonn
%O A075280 1,1
%A A075280 _Zak Seidov_, Sep 12 2002