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 A092449 #7 Jan 08 2013 15:48:03 %S A092449 753,11753,1311753,19171311753,2319171311753,292319171311753, %T A092449 31292319171311753,3731292319171311753,413731292319171311753, %U A092449 43413731292319171311753,4743413731292319171311753 %N A092449 Composite numbers in A092447. %H A092449 M. Fleuren, <a href="http://www.gallup.unm.edu/~smarandache/SmBackConOddPrimes.htm">Smarandache Back Concatenated Odd Primes</a> %H A092449 H. Marimutha, <a href="http://www.gallup.unm.edu/~smarandache/smarcon.htm">Smarandache Concatenated Type Sequences</a>, Bulletin of Pure and Applied Sciences, Vol. 16 E(No.2), 1997; p. 225-226. %K A092449 nonn,base,less %O A092449 1,1 %A A092449 Micha Fleuren (michafleuren(AT)hotmail.com), Mar 24 2004 %E A092449 More terms from _Ray Chandler_, Mar 28 2004