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 A274411 #6 Jun 22 2016 23:52:30 %S A274411 3067,4088,6135,7151,8179,9979,10904,13304 %N A274411 Erroneous version of A274410. %H A274411 Marcus Elia and Amanda Tucker, <a href="https://www.emis.de/journals/INTEGERS/papers/p54/p54.Abstract.html">Consecutive Integers and the Collatz Conjecture</a>, INTEGERS, Electronic J. of Combinatorial Number Theory, Vol. 15, Paper A54, 2015. %K A274411 dead %O A274411 1,1