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 A074113 #12 Jan 18 2017 22:36:20 %S A074113 8,64,512,8192,65536,524288,8388608,67108864,536870912,8589934592, %T A074113 68719476736,549755813888,8796093022208,70368744177664, %U A074113 562949953421312,9007199254740992 %N A074113 Duplicate of A074116. %K A074113 dead %O A074113 1,1