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 A034670 #9 Jun 01 2025 22:43:25 %S A034670 7,127,5461,299593,17895697,1108378657,69810262081,4432676798593 %N A034670 Duplicate of A020516. %K A034670 dead %O A034670 0,1