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 A210613 #19 Apr 10 2014 00:20:07 %S A210613 0,1,3,7,13,25,43,48,81,95,161,173,274,276,390,474,661,841,896,978, %T A210613 994,1446,1524,1762,1787,1793,1828,2673,2869,3212,4488,4553,5116,5396, %U A210613 5400,7465,7474,8218 %N A210613 Records in A210612. %C A210613 Sequence related to Recamán's sequence. %H A210613 <a href="/index/Rea#Recaman">Index entries for sequences related to Recamán's sequence</a> %Y A210613 Cf. A005132, A210606-A210612. %K A210613 nonn,more %O A210613 1,3 %A A210613 _Omar E. Pol_, Mar 25 2012 %E A210613 More terms from _Alois P. Heinz_, Apr 03 2012