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.
+1) } 1..13); $lo = $hi+1; $hi = 2*$lo } # _Daniel Suteu's wiki page.
+1) } 1..13); $lo = $hi+1; $hi = 2*$lo } # _Daniel Suteu has authored 0 sequences.