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 A139112 #3 Mar 30 2012 17:39:33 %S A139112 4,74,4794,306874,314239934,80445423294,5148507090874, %T A139112 5272071261055934,1349650242830319354,1382041848658247019502, %U A139112 353802713256511236992702,362293978374667506680527806,1483956135422638107363441897454 %N A139112 Bisection of A139104. %Y A139112 Cf. A139104. %K A139112 nonn %O A139112 1,1 %A A139112 _Omar E. Pol_, Apr 08 2008 %E A139112 More terms from _R. J. Mathar_, May 22 2008