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 A083138 #10 May 25 2014 08:38:40 %S A083138 323,767,989,10001,11111,13031,14141,14941,15151,17371,32023,33233, %T A083138 34343,36763,71017,73937,74147,74947,77177,77677,78587,90109,92629, %U A083138 94249,1006001,1013101,1024201,1033301,1047401,1049401,1066601,1073701 %N A083138 Composite numbers in A083137. %Y A083138 Cf. A002113, A083136, A083139. %K A083138 base,nonn %O A083138 1,1 %A A083138 _Amarnath Murthy_ and Meenakshi Srikanth (menakan_s(AT)yahoo.com), Apr 24 2003 %E A083138 Corrected and extended by _Reinhard Zumkeller_, May 05 2003