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 A117827 #6 May 26 2014 23:48:47 %S A117827 5,6,9,10,13,17,20,28,31,35,39,42,57,61,72,75,79,83,86,97,101,105,126, %T A117827 141,145,181,185,221,308,323,327,363,367,403,505,509,530,545,549,585, %U A117827 589,625,712,727,731,767,771,807,909,913,949,953,989,993 %N A117827 A117830 sorted and duplicates removed. %H A117827 N. J. A. Sloane and others, <a href="/wiki/Sequences_of_RADD_type">Sequences of RADD type</a>, OEIS wiki. %K A117827 nonn,fini,full,base %O A117827 1,1 %A A117827 Luc Stevens (lms022(AT)yahoo.com), Apr 06 2006 %E A117827 Edited by _N. J. A. Sloane_, May 05 2006