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 A164325 #7 Apr 01 2017 06:46:35 %S A164325 1,2,2,6,1170,64590,25153800,25153800,4747505070,207187349040, %T A164325 6703860240000,26997529639080,1760354281625940,1760354281625940, %U A164325 10718654377787155800 %N A164325 a(n) is the smallest number m such that (2k-1)m+1 is prime for all 0<k<n+1. %Y A164325 Cf. A088250, A071576, A164326, A088251, A088651, A125838, A125839, A088252. %K A164325 more,nonn %O A164325 1,2 %A A164325 _Farideh Firoozbakht_, Sep 15 2009 %E A164325 a(5) corrected by Zak Seidov, Sep 16 2009 %E A164325 a(10) and a(11) from _Zak Seidov_, Sep 17 2009 %E A164325 a(12)=26997529639080 from _Zak Seidov_, Sep 25 2009 %E A164325 a(13)-a(15) from _Giovanni Resta_, Apr 01 2017