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 A075602 #5 Dec 05 2013 19:55:39 %S A075602 17,1171,211711,32117117,6321171179,263211711799,42632117117999, %T A075602 6426321171179993,564263211711799931,15642632117117999311, %U A075602 1156426321171179993119,311564263211711799931199 %N A075602 a(1) = 17 and then the smallest prime that is obtained by placing digits on both sides of the previous term. Or smallest prime that encompasses a(n-1). %Y A075602 Cf. A075595, A075596, A075597, A075598, A075599, A075600, A075601. %K A075602 base,nonn %O A075602 1,1 %A A075602 _Amarnath Murthy_, Sep 28 2002 %E A075602 More terms from _Sascha Kurz_, Jan 23 2003