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 A299917 #3 Mar 10 2018 16:07:25 %S A299917 0,1,6,9,69,513,3789 %N A299917 Erroneous version of A299915. %D A299917 Murat Sahin and Elif Tan, Conditional (strong) divisibility sequences, Fib. Q., 56 (No. 1, 2018), 18-31. See Example 2.9. %K A299917 dead %O A299917 0,3