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 A085873 #7 Dec 05 2013 19:56:18 %S A085873 2,5,31,373,22381,134287,3760037,481284737,25989375799,6237450191761, %T A085873 411671712656227,64220787174371413,73468580527480896473, %U A085873 1028560127384732550623,185140822929251859112141 %N A085873 a(1) = 2; a(n)= smallest prime of the form k*a(n-1) + 1 where k itself is a multiple of n. %e A085873 a(2)= 5 = 2*2 + 1, a(3) = 6*5 + 1, a(4) = 12*31 + 1; 2,6 and 12 are respectively multiples of 2, 3 and 4. %K A085873 nonn %O A085873 1,1 %A A085873 _Amarnath Murthy_, Jul 07 2003 %E A085873 More terms from _Ray Chandler_, Jul 08 2003 %E A085873 Corrected by _T. D. Noe_, Nov 15 2006