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 A069635 #3 Dec 05 2013 19:55:16 %S A069635 8,83,283,2833,32833,328331,2328331,232833103,31232833103, %T A069635 3123283310321,33123283310321,3312328331032109,333312328331032109, %U A069635 33331232833103210927,933331232833103210927,93333123283310321092711 %N A069635 a(1) = 8; a(2n) = smallest prime starting (most significant digits) with a(2n-1). a(2n+1) = smallest prime ending (least significant digits)in a(2n). %Y A069635 Cf. A069614 to A069621, A069628 to A069636. %K A069635 nonn,base %O A069635 1,1 %A A069635 _Amarnath Murthy_, Mar 27 2002 %E A069635 Edited and extended by _Robert G. Wilson v_, Apr 03 2002